The answer to your question is 2
I think the answers are 1) Hox genes
2)B But I'm not sure
the brain stem controls involuntary actions such as breathing, heart beating and blinking.
Increases because there's more food for the carnivores, as a result, the gradually the herbivores will decrease as the reach to a point they are no longer able to feed all the predators
The answer to your question is homeostasis
