Pupillary response is a physiological response that varies the size of the pupil, via the optic and oculomotor cranial nerve. Involuntary reflex reaction to exposure or inexposure to light—in low light conditions a dilated pupil lets more light into the eye. :)
D. I just took the test on USA Test prep so ya, remember to mark this the brainlyest answer
Answer: Swim bladders of fish at depth help maintain buoyancy by regulating gas levels.
