Problem:

You are presented with the quiz "many what feed at more than one trophic level"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "many consumers feed at more than one trophic level" and "carnivores are consumers which eat animals or other consumers".   So, what's the best answer to the question?
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A: carnivores


Problem:

You are presented with the quiz "What helps species grow stronger?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mutations are essential for evolution to occur" and "besides, evolution means stronger members of the species survive".   So, what's the best answer to the question?
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A: mutations


Problem:

You are presented with the quiz "What can cause famine?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "drought is when amount of precipitation decreases" and "drought causes famine, which contributes to decentralization and unrest".   So, what's the best answer to the question?
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A: Decreased precipitation


Problem:

You are presented with the quiz "Furry animals grow thicker coats which has what impact on their survival?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "staying warm has a positive impact on an animal 's survival" and "furry animals grow thicker coats to keep warm in the winter".   So, what's the best answer to the question?
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A: