In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.
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Question: Sentence: The ears are an external feature in human beings is responsible for balance. Question: What external feature in human beings is responsible for balance?

Answer: ears


Question: Sentence: Lichens are not a single organism, but rather an example of a mutualism. Question: Lichens are not a single organism, but rather an example of a what?

Answer: mutualism


Question: Sentence: Instead of heat, organisms use catalysis to speed up reactions. Question: Instead of heat, organisms use what to speed up reactions?

Answer:
catalysis