Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
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Question: Question: Reflected in their relatively high level of intelligence and their ability to learn new behaviors, what organs tend to be relatively large in primates? Answer: brains

Answer: Primates tend to have bigger brains for their body size than other mammals. This is reflected in their relatively high level of intelligence and their ability to learn new behaviors.

Question: Question: When hit from behind in a car crash, a passenger can suffer a neck injury called what? Answer: whiplash

Answer: When hit from behind in a car crash, a passenger can suffer a neck injury called whiplash . Explain in terms of inertia how this occurs, and how headrests can prevent the injury.

Question: Question: What part of the atmosphere is the heat source? Answer: stratosphere

Answer:
Temperature decreases in the mesosphere with altitude. This is because the heat source is the stratosphere.