What two nervous systems balance each other to provide homeostasis?
o
a. parasympathetic and sympathetic
o
b. central and peripheral
o
c. central and sympathetic
d. somatic and parasympathetic

Parasympathetic and sympathetic -A.

 The correct answer is: [A]:

                →  " parasympathetic and sympathetic " .

The 2 (two) "nervous systems" that balance each other to provide "homeostasis" are:

   1)   the "parasympathetic" nervous system ;  and:

  2)  the "sympathetic"  nervous system.

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the correct answer is:

a population changes in response to a change in the environment.