TASK DEFINITION: Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.
PROBLEM: Fact: cycles of freezing and thawing water cause ice wedging

SOLUTION: Ice wedging is caused by cycles of freezing and thawing of what?

PROBLEM: Fact: the Himalayas were formed by rock folding

SOLUTION: High areas can be visually represented by:?

PROBLEM: Fact: friction is used for stopping a vehicle by brakes

SOLUTION:
friction is used for stopping a vehicle by?