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

Example Input: Hydrocarbons compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization.
Example Output: What compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization?

Example Input: Intraplate earthquakes occur because solid lithosphere travels on a round planet.
Example Output: What occur because solid lithosphere travels on a round planet?

Example Input: Animals engage in internal digestion.
Example Output:
What sort of digestion do animals engage in?