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

[Q]: Incubation is when birds keep their eggs warm while the embryos inside develop.
[A]: What is it called when birds keep their eggs warm while the embryos inside develop?

[Q]: 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.
[A]: 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?

[Q]: The vivid colors of flowers are an adaptation designed to encourage pollination by animals such as insects and birds.
[A]:
The vivid colors of flowers are an adaptation designed to encourage what by animals such as insects and birds?