TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Trichomoniasis is cause by a protozoa.

SOLUTION: Trichomoniasis is cause by what type of pathogen?

PROBLEM: A fewer predators is most likely to cause the number of rabbits living in an area to increase.

SOLUTION: Which factor is most likely to cause the number of rabbits living in an area to increase?

PROBLEM: Muscle atrophy due to age is called sarcopenia.

SOLUTION:
Muscle atrophy due to age is called what?