Which statement best describes heating by radiation? A. Air molecules touch the warm ground, heating them up.

B. Warm air rises and takes heat with it; eventually it cools and sinks.

C. Air at the equator rises and sinks at the poles.

D. Sunlight travels through space without the aid of fluids or solids.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

im not intirely sure but i think the anwser is d relative humidity