Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Example Input: Diffraction is the phenomenon in which light and sound waves become circular at the point source of a barrier.
Example Output: What is the phenomenon in which light and sound waves become circular at the point source of a barrier?

Example Input: Like skeletal muscle, cardiac muscle is striated.
Example Output: Like skeletal muscle, cardiac muscle is what?

Example Input: Soil, for human purposes, is a(n) nonrenewable resource.
Example Output:
What kind of a resource is soil, for human purposes?