The answer to you’re question is carbon dioxide
You need to know the area your in, build shelter on a well leveled ground, find a fast running stream or river near by, and know the hunting grounds there for animal population for food.
I NEED THE STATEMENTS PLSS
As for question number 7 this is how you can be cool take it from someone who has had a personal experience with trying to be cool well for one just be your self and others can accept you for who you are or not accept you but at the end of the day you’re going to be worrying about trying to be cool and the people you tryna be cool for going to still be living there life not worried I pray this helps .