Explain two ways that carbon returns to the atmosphere from animals.
hint: how is carbon dioxide involved?

When animals die it decompose there body parts , then releases carbon dioxide in the atmosphere. Also when an animal breaths in and out it lets out carbon dioxide into the atmosphere.          

Explanation:

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d