a layer of water just under a frog's skin captures oxygen from air or water and delivers it to blood vessels at the skin's surface. how might this function relate to the fact that frogs are very sensitive to environmental pollution

Frogs breathe through water through their skin. This means their entire skin is their respiratory system in a way. If they submerge themselves in dirty and impure water, they'll become very easily sick and die.

c. heat from the poles back down towards the equator.

its probably to later but whats the question