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

Example Input: Terrestrial biomes are classified by climatic factors and types of primary producers.
Example Output: What are classified by climatic factors and types of primary producers?

Example Input: Transient pseudopodia are temporary feet that protists have called.
Example Output: What are temporary feet that protists have called?

Example Input: 40 m/s north of the following represents the velocity of a moving object.
Example Output:
Which of the following represents the velocity of a moving object?