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

[EX Q]: The vascular structure functions as a framework that reinforces the shape of the leaf.
[EX A]: What functions as a framework that reinforces the shape of the leaf?

[EX Q]: A(n) an ionic bond forms when the metal sodium gives up an electron to the nonmetal chlorine.
[EX A]: What forms when the metal sodium gives up an electron to the nonmetal chlorine?

[EX Q]: Science is a process of knowing about the natural universe through observation and experimentation.
[EX A]:
Science is a process of knowing about the natural universe through what two actions?