TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Gravity makes soil and rock particles move gradually down the slope during each thaw.

SOLUTION: What makes soil and rock particles move gradually down the slope during each thaw?

PROBLEM: A wall of rocks or concrete a called a groin.

SOLUTION: What is a wall of rocks or concrete called?

PROBLEM: Mutations are changes to an organism's dna and are an important driver of diversity in populations.

SOLUTION:
What term is used to describe changes to an organism's dna and are an important driver of diversity in populations?