In a forest ecosystem including rabbits, wolves, foxes, and plants, what are two possible reasons the rabbit population might decline?

hint: what do animals need to survive? what can hurt them?

the endocrine system secretes hormones into blood and other body fluids. these chemicals are important for metabolism, growth, water and mineral balance, and the response to stress. hormones provide feedback to the brain to affect neural processing. reproductive hormones affect the development of the nervous system.

geologic time scale (for gradpoint) =)