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

Example Input: Electron transport is the final stage of aerobic respiration, when energy from the krebs cycle is transferred to atp.
Example Output: What is the final stage of aerobic respiration, when energy from the krebs cycle is transferred to atp?

Example Input: A change of season and less food usually cause certain animals to migrate.
Example Output: Which two environmental changes usually cause certain animals to migrate?

Example Input: Different media affect the speed of light.
Example Output:
Different media affect what property of light?