2 Why is more known about the caves in Europe, the USA and Australia than these
other parts of the world?
3 For what two reasons is the deep ocean difficult for people
to explore?
4 How much of the ocean floor remains unexplored?
5 Why is the Amazon rainforest so interesting for biologists?
6 What's special about the animals and plants that exist in deserts?​

1) Because this place is inaccessible and inhospitable.

2) Because in these countries, cave exploration is a popular activity.

3) It is cold temperature and hig pressure.

4) Roughly 98% of the ocean remains unexplored.

5) Because there are hard-to-reach places where anything can be hiding.

6) The peculiarity is that animals can survive at high temperatures and minim