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

Input: Consider Input: Incubation is when birds keep their eggs warm while the embryos inside develop.

Output: What is it called when birds keep their eggs warm while the embryos inside develop?


Input: Consider Input: Water affects the availability of oxygen important element in aquatic environments and in flooded soils.

Output: Water affects the availability of what important element in aquatic environments and in flooded soils?


Input: Consider Input: The stem is the basic structure that holds plants upright, allowing plants to get the sunlight and air they need.


Output: What is the basic structure that holds plants upright, allowing plants to get the sunlight and air they need?