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

Cells are the  basic building blocks of the human body.
What are the  basic building blocks of the human body?

Learned behavior is adaptive because they are flexible, capable of changing if the environment changes.
What kind of behaviors are adaptive because they are flexible, capable of changing if the environment changes?

The law of superposition is best described by: in undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.

Which statement best describes the Law of Superposition?