Read the text below and think of the word which best fits each space. use only one word in each space. wake up, it’s summer the summer season makes of us feel good, and scientists believe that they discovered the reason for this. “bright light makes you feel more awake and helps you sleep better,” says dr.arendt, from the university of surrey, is studying the effect of light the human body. light travels through the eye and sends a message to the part of the brain that controls sleep and appetite. so in the summer months sunlight is increased, your energy level goes thus decreasing th eneed to eat and sleep. , the heat from the sun also a calming effect as it reduces blood pressure, producing a feeling of relaxation. sea and mountain air are also beneficial in summer as they make you breathe deeply, increasing the of oxygen in your blood. for people, however, there is a negative side . those suffering low blood pressure may experience feelings of tiredness and anxiety at this of the year. experts advise such people to exercise and to add more salt their diet. so, if you can, enjoy the benefits of bright light, warm days and you’ll feel completely refreshed.

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