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

Plankton is the most common life form in the ocean.
What is the most common life form in the ocean?

In science, theory is supported by much evidence, widely accepted by credible scientists, and unlikely to be disproved.
In science, what is supported by much evidence, widely accepted by credible scientists, and unlikely to be disproved?

Bogs develops in depressions where water flow is low or nonexistent.
What develops in depressions where water flow is low or nonexistent?