Answer:
A
Explanation:
Both lions and gazelles are biotic
Answer: to get away from the handler
Explanation:
Answer: Serotonin
Explanation:
Serotonin is an hormone, derived from the amino acid, tryptothan. It is involved in vasodilation, sleep regulation, mood changes, capillary permeability, and causes contraction of smooth muscles like that of the stomach to signal hunger.
