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 can human facial expressions communicate? Answer: emotions

A: Human facial expressions can communicate emotions.
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Q: Question: What is formed when a subducting plate flows under another tectonic plate? Answer: volcanic arc

A: A volcanic arc is formed when a subducting plate flows under another tectonic plate.
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Q: Question: What occurs where the water motion slows? Answer: deposition

A:
Deposition occurs where the water motion slows.
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