Problem:

You are presented with the quiz "What may soak into the ground, becoming groundwater?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "some precipitation that falls on land may soak into the ground, becoming groundwater" and "rain is only one kind of precipitation".   So, what's the best answer to the question?
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A: rain


Problem:

You are presented with the quiz "Most types of what have motility?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "most protists have motility" and "protists Protists are single-celled organisms".   So, what's the best answer to the question?
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A: single-celled organisms


Problem:

You are presented with the quiz "What do Xerophytes do to adapt to dry environments?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "plants that are adapted to very dry environments are called xerophytes" and "plants that have adapted by altering their physical structure are called xerophytes ".   So, what's the best answer to the question?
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A: alter their physical structure


Problem:

You are presented with the quiz "What is a reason to work with used materials during manufacturing?"   But you don't know the answer, so you turn to your teacher to ask for hints. He says that "recycling reduces the resources needed to make something" and "recycling is the reuse of material".   So, what's the best answer to the question?
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A:
Reduces need for new resources