In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Q: Question: Dan falls from a single stair one day, then the next day falls down three stairs at once. After falling down one stair, compared to three, Dan will experience
Answer: less friction

A: Heavier objects press together with greater force, and this causes greater friction between them.
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Q: Question: When we have one bag of dog food and we add two new dogs we will run out of food
Answer: faster

A: As the population increases, the food supply, or the supply of another necessary resource, may decrease.
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Q: Question: We shiver when it is cold because it allows us to produce
Answer: more heat

A:
For example, on a cold day, an endotherm may produce more body heat by increasing its rate of metabolism.
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