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

[EX Q]: A mushroom is the fruiting body that occurs after two hyphae mate and form a mycelium with sporangia.
[EX A]: What is the fruiting body that occurs after two hyphae mate and form a mycelium with sporangia?

[EX Q]: Plankton is the most common life form in the ocean.
[EX A]: What is the most common life form in the ocean?

[EX Q]: Most of the energy used by living things comes either directly or indirectly from the sun.
[EX A]:
Most of the energy used by living things comes either directly or indirectly from what?