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

Input: Consider Input: In a carbon triple bond, three pairs of electrons are shared.

Output: In a carbon triple bond, how many pairs of electrons are shared?

Input: Consider Input: Low energy causes waves to bring sand up onto the beach during summers.

Output: What causes waves to bring sand up onto the beach during summers?

Input: Consider Input: Landslides moving loose rocks downhill process is the best example of a sudden change to earth's surface.
Output: Which process is the best example of a sudden change to Earth's surface?