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.

Q: Sentence: Diffusion is the process in which a substance naturally moves from an area of higher to lower concentration. Question: What is the process in which a substance naturally moves from an area of higher to lower concentration called?

A: diffusion
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Q: Sentence: Air quality is a measure of pollutants in the air. Question: Air quality is a measure of what in the air?

A: pollutants
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Q: Sentence: Ossification begins approximately six weeks after fertilization in an embryo. Question: What begins approximately six weeks after fertilization in an embryo?

A:
ossification
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