instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Although they differ vastly in hardness, pencil lead and diamonds both contain carbon.
answer:
Although they differ vastly in hardness, pencil lead and diamonds both contain what element?


question:
Surface tension is responsible for the fact that small insects can walk on water.
answer:
Surface tension is responsible for the fact that small insects can do this on water?


question:
A(n) favorable trait is an adaptation.
answer:

What is an adaptation?