QUESTION: Generate a question with a factual answer?

ANS: When a new apex predator moves into an area this changes.

QUESTION: Generate a question with a factual answer?

ANS: How many lines does the Melbourne rail network have?

QUESTION: Generate a question with a factual answer?

ANS: What did television do for wrestling?

QUESTION: Generate a question with a factual answer?

ANS:
Why were plant populations affected after wolves were eliminated from Yellowstone?