Which of these is not a response of internal stimuli?
a)eating when hungry
b)breathing hard when exercising because of a drop in oxygen levels
c)wearing sunglasses to protect eyes from uv rays
d)drinking when thirsty

The answer is B I took the quiz that is the answer

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well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.