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

Example Input: Instead of heat, organisms use catalysis to speed up reactions.
Example Output: Instead of heat, organisms use what to speed up reactions?

Example Input: The earth's magnetic poles have switched places repeatedly in the past.
Example Output: The earth's magnetic poles have done what repeatedly in the past?

Example Input: Ocean water appears cyan because microbes in the water preferentially absorb red light.
Example Output:
Ocean water appears cyan because microbes in the water preferentially absorb what color of light?