Given a scientific passage and an answer, generate a question for the given answer.

[EX Q]: Passage: Carbon moves through ecosystems in two cycles that overlap. In the biotic cycle, it moves between living things and the air. In the abiotic cycle, it moves between the air, ground, and oceans. By burning fossil fuels, humans have increased the amount of carbon dioxide in the air. Answer: biotic cycle
[EX A]: In what part of the carbon cycle does carbon move between living things and the air?

[EX Q]: Passage: Young reptiles, like the baby alligator in Figure below , look like smaller versions of the adults. They don't have a larval stage as most amphibians do. Baby reptiles are able to move and search for food but are at high risk of predation. Adult reptiles rarely provide any care for their offspring once the eggs are laid. The only exceptions are female alligators and crocodiles. They defend their eggs and hatchlings from predators and help them reach the water. Answer: larval stage
[EX A]: What developmental stage do alligators lack that most other amphibians have?

[EX Q]: Passage: Water is involved in many other biochemical reactions. As a result, just about all life processes depend on water. Clearly, life as we know it could not exist without water. Answer: water
[EX A]:
Nearly all life processes depend on what substance, which is involved in biochemical reactions?