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

[Q]: Oxygen gas is given off by plants.
[A]: Which gas is given off by plants?

[Q]: In circles way do particles of water move in deep water.
[A]: In which way do particles of water move in deep water?

[Q]: The term ecological succession refers to the sequence of community and ecosystem changes after a disturbance.
[A]:
What term refers to the sequence of community and ecosystem changes after a disturbance?