In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Q: Question: What do craters and rifts become when they fill with water? Answer: lakes

A: Lakes do craters and rifts become when they fill with water.
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Q: Question: What is the amount of product that may be produced by a reaction under specified conditions called? Answer: theoretical yield

A: The amount of product that may be produced by a reaction under specified conditions is called theoretical yield.
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Q: Question: What organ participates in all digestive activities except ingestion and defecation? Answer: stomach

A:
Stomach organ participates in all digestive activities except ingestion and defecation.
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