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

[EX Q]: Interconnected pathways through which carbon is recycled through the biotic and abiotic components of biosphere.
[EX A]: Interconnected pathways through which carbon is recycled through the biotic and abiotic components of what?

[EX Q]: Moving air masses is the main reason for weather change.
[EX A]: What is the main reason for weather change?

[EX Q]: Most crustaceans have separate sexes, so they reproduce sexually using eggs and sperm.
[EX A]:
Most crustaceans have separate sexes, so they reproduce sexually using what?