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: Which of the following best describes a role of mushrooms in ecosystems? Answer: breaking down dead plant material

A: A role of mushrooms in ecosystems is breaking down dead plant material.
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Q: Question: What scale is used to succinctly communicate the acidity or basicity of a solution? Answer: ph

A: The ph scale is used to succinctly communicate the acidity or basicity of a solution.
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Q: Question: What period starts after the baby is born, and the placenta is expelled from the body? Answer: postpartum

A:
The postpartum period starts after the baby is born, and the placenta is expelled from the body.
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