The portion of the nervous system serves that functions independently and continuously without conscious effort is the

AUTONOMIC NERVOUS SYSTEM The autonomic nervous system (ANS) is the portion of the PNS that functions independently, automatically, and continuously, without conscious effort. It helps to regulate the smooth muscles, cardiac muscle, digestive tube, blood vessels, sweat and digestive glands, and certain endocrine glands.

thinking it would be d not too sure but i think it's right

b) the inside picture would look at a very high temperature in a very low ph