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

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

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


Input: Consider Input: The amniotic egg first evolved in reptiles.

Output: The amniotic egg first evolved in what species?


Input: Consider Input: Binary compounds of carbon with less electronegative elements are called carbides.
Output: Binary compounds of carbon with less electronegative elements are called what?