This information is important because many scientists discovered that exercising promotes chemicals in the your brain that bring up your mood and make you feel relaxed. When you exercise the brain releases chemicals called endorphin that make you feel good. Endorphins help depressed moods, which Andre seems to experience.
Answer: Scientists have done numerous studies showing that exercising promotes chemicals in the brain that better your mood and makes you feel more relaxed. Some of these chemicals are dopamine and endorphins. This can help the depressed moos that Andre seems to have.
Explanation: I hope this helps and I answered quick enough, if you ever need more help paraphrasing stuff message me :)
"You" can be either singular or plural. "You" can be used to talk about one person or more than one person and that makes it to be either singular or plural.
Troy believes the lottery to be foolish because there is such a slim chance of winning that there is no point in it. This shows he is a cautious person and isn't gullible.