Answer:
Protein benefit animals because they need this to form new skin cells. They also use protein to grow hair, build muscle tissue etc. Protein also helps the animals to create chemicals like hormones and enzymes that are needed for their normal function.
Explanation:
The gland that controls formation would be testes.
Answer:
C: Hormones
Explanation:
hormones do not "signal" other cells. I hope this helps :)
Answer: A) wastes
Explanation:
More people, more littering
