TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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: Deletions remove one or more nucleotides from the dna

SOLUTION: Deletions remove one or more what from the dna?

PROBLEM: Concave lenses can correct myopia.

SOLUTION:
What type of lenses can correct myopia?