c) match the words with their definitions 1.Ecology 2.Flora 3.Fauna 5.Habitat 6.Pollution 7.Carbon dioxide 8.Oxygen 9.Ozone layer 10.Ultraviolet radiation 11.Conservation 12.Acid rain

1. Ecology - the branch of science that studies the interactions between organisms and their environment.
2. Flora - all the plants that are native or characteristic of a particular geographical area or time period.
3. Fauna - all the animals that are native or characteristic of a particular geographical area or time period.
4. Habitat - the natural environment in which an organism lives, including all the living and non-living elements.
5. Pollution - the presence of harmful substances or pollutants in the environment, which can cause damage to living organisms.
6. Carbon dioxide - a greenhouse gas produced by burning fossil fuels and other human activities, which contributes to climate change.
7. Oxygen - a gas that is essential for the respiration of most organisms, produced by plants during photosynthesis.
8. Ozone layer - a layer of ozone in the Earth's stratosphere that protects against the harmful ultraviolet (UV) radiation from the sun.
9. Ultraviolet radiation - a type of electromagnetic radiation from the sun that is invisible to the human eye and can cause various health problems.
10. Conservation - the sustainable use and management of natural resources to ensure their long-term availability and protect biodiversity.
11. Acid rain - rain that has a pH lower than 5.6, caused by the release of sulfur dioxide and nitrogen oxide into the atmosphere, which can have harmful effects on plants, animals, and infrastructure.

To match the words with their definitions, we need to analyze the meanings of each word and find the definition that closely corresponds to it:

1. Ecology - the branch of science that studies the interactions between organisms and their environment.
2. Flora - all the plants that are native or characteristic of a particular geographical area or time period.
3. Fauna - all the animals that are native or characteristic of a particular geographical area or time period.
4. Habitat - the natural environment in which an organism lives, including all the living and non-living elements.
5. Pollution - the presence of harmful substances or pollutants in the environment, which can cause damage to living organisms.
6. Carbon dioxide - a greenhouse gas produced by burning fossil fuels and other human activities, which contributes to climate change.
7. Oxygen - a gas that is essential for the respiration of most organisms, produced by plants during photosynthesis.
8. Ozone layer - a layer of ozone in the Earth's stratosphere that protects against the harmful ultraviolet (UV) radiation from the sun.
9. Ultraviolet radiation - a type of electromagnetic radiation from the sun that is invisible to the human eye and can cause various health problems.
10. Conservation - the sustainable use and management of natural resources to ensure their long-term availability and protect biodiversity.
11. Acid rain - rain that has a pH lower than 5.6, caused by the release of sulfur dioxide and nitrogen oxide into the atmosphere, which can have harmful effects on plants, animals, and infrastructure.

Now, let's match the words with their respective definitions:

1. Ecology - the branch of science that studies the interactions between organisms and their environment.
2. Flora - all the plants that are native or characteristic of a particular geographical area or time period.
3. Fauna - all the animals that are native or characteristic of a particular geographical area or time period.
4. Habitat - the natural environment in which an organism lives, including all the living and non-living elements.
5. Pollution - the presence of harmful substances or pollutants in the environment, which can cause damage to living organisms.
6. Carbon dioxide - a greenhouse gas produced by burning fossil fuels and other human activities, which contributes to climate change.
7. Oxygen - a gas that is essential for the respiration of most organisms, produced by plants during photosynthesis.
8. Ozone layer - a layer of ozone in the Earth's stratosphere that protects against the harmful ultraviolet (UV) radiation from the sun.
9. Ultraviolet radiation - a type of electromagnetic radiation from the sun that is invisible to the human eye and can cause various health problems.
10. Conservation - the sustainable use and management of natural resources to ensure their long-term availability and protect biodiversity.
11. Acid rain - rain that has a pH lower than 5.6, caused by the release of sulfur dioxide and nitrogen oxide into the atmosphere, which can have harmful effects on plants, animals, and infrastructure.

By carefully analyzing the definitions and matching them with the words, we have successfully matched each word with its definition.

I hope this detailed explanation helps you understand the meanings of these words! Let me know if you have any further questions.