Common symptoms of iron-deficiency anemia include muscle weakness, shortness of breath, and lightheadedness

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

its b. greenhouse gasses trap uv rays for heat so that the plants stay alive.