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. :)
I'm pretty sure that its the 3rd answer
<span>planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originate</span>
Most of the light passes through glass but none of the light passes through metal.
