Hello!
The brainstem that controls those functions, as well as others is known as the <span>medulla. The Medulla is the lower half of the brain. This stem is connected to the spinal cord, so if damaged will more than likely result in death/brain death,
I hope this helped!
I am, yours most sincerely,
SuperHelperThingy</span>
Because they are autorotrophs(they make their own food)so most organisms depend on them.
I believe it is biosphear<span />
Slightly movable is the answer