instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Some compounds form rigid frameworks called crystals.
answer:
Some compounds form rigid frameworks called what?

question:
Low energy causes waves to bring sand up onto the beach during summers.
answer:
What causes waves to bring sand up onto the beach during summers?

question:
Resemblance to other species can serve as protection to prey category of species.
answer:
Resemblance to other species can serve as protection to what category of species?