In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.
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Question: Question: The face of the sphinx has changed from? Answer: wearing away.

Answer: wind and rain cause erosion


Question: Question: What is a source of energy for animals? Answer: grains.

Answer: food is a source of energy for animals


Question: Question: Animals eat food for the taste but also because without it, they would? Answer: expire.

Answer:
an animal needs to eat food for nutrients