QUESTION: Generate a question with a factual answer?

ANS: Some USB devices require what?

QUESTION: Generate a question with a factual answer?

ANS: How many people ride the Mexico city subway system each day?

QUESTION: Generate a question with a factual answer?

ANS: What was the tree called he sat under?

QUESTION: Generate a question with a factual answer?

ANS:
What is the study of plants and the environment in which they live?