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

[EX Q]: Cells are the  basic building blocks of the human body.
[EX A]: What are the  basic building blocks of the human body?

[EX Q]: Three many families are known quarks divided into.
[EX A]: How many families are known quarks divided into?

[EX Q]: Landslides moving loose rocks downhill process is the best example of a sudden change to earth’s surface.
[EX A]:
Which process is the best example of a sudden change to Earth’s surface?