Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: The name for a matter that has a fixed volume and a fixed shape is solid.

Answer: What is the name for a matter that has a fixed volume and a fixed shape?

Question: Evolution occurs by natural selection, a process whereby better-adapted members pass along their traits, according to darwin.

Answer: Evolution occurs by what process whereby better-adapted members pass along their traits, according to darwin?

Question: Smaller size of ring will a summer drought cause in a tree.

Answer:
What size of ring will a summer drought cause in a tree?