1. humans cause deforestation, which destroys animals' habitat
2. humans cause water pollution, by throwing harmful chemicals in the sewer causing marine animals to die
3. humans are destroying animals' habitat forcefully to build more homes for peoples
Answer: Giving birth only in the spring and summer ensures that offspring are born when food is most available.
Explanation:
I think it might be C I am not 100% sure though
It is apart of cellular DNA an ATP, and is a major component of bones and teeth, it is often only available in limited quantities in the the environment.