TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Fires, mainly caused by lightning, are a natural disturbance in temperate grasslands.

SOLUTION: Fires, mainly caused by what, are a natural disturbance in temperate grasslands?

PROBLEM: Metabolism produces waste energy in the form of heat, which helps warm-blooded (endotherm) animals conserve and maintain heat at a relatively constant body temperature.

SOLUTION: Metabolism produces waste energy in the form of heat, which helps what type of animal conserve and maintain heat at a relatively constant body temperature?

PROBLEM: The primary advantage of sexual reproduction when compared to asexual reproduction is that there is greater genetic variety in offspring.

SOLUTION:
Which of the following is the primary advantage of sexual reproduction when compared to asexual reproduction?