Answer:
Because trees make oxygen, and we need that to live. Also trees are major homes for many birds, mammals, and reptiles.
Explanation:
The normal body responses is when you exercise, your muscles act something like electric motors<span>. Your muscles take in a source of energy and they use it to generate force. An electric motor uses electricity to supply its energy. Your muscles are biochemical motors, and they use a chemical called adenosine triphosphate (ATP) for their energy source. During the process of "burning" ATP, your muscles need three things:</span>
Answer:
because they need to be responsble to do thing and not being silly