Why might the lung volume of an athlete, singer, or wind instrument musician be different from someone who does not participate in any of these activities?

c.more precipitation,but only when emission levels.

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