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

[Q]: Terrestrial biomes are classified by climatic factors and types of primary producers.
[A]: What are classified by climatic factors and types of primary producers?

[Q]: Plant nutrition is the study of the chemical elements necessary for plant growth.
[A]: What is the study of the chemical elements necessary for plant growth called?

[Q]: Chemical energy is stored in the atom bonds.
[A]:
Where is chemical energy stored?