instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
A change of season and less food usually cause certain animals to migrate.
answer:
Which two environmental changes usually cause certain animals to migrate?


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:
Eukaryotic type of organisms have internal clocks that regulate cyclic processes.
answer:

What type of organisms have internal clocks that regulate cyclic processes?