TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Thermoregulation is the process when animals maintain an internal temperature.

SOLUTION: What is the process when animals maintain an internal temperature?

PROBLEM: Constructive forces type of forces are involved when deposited rock forms deltas or barrier islands.

SOLUTION: What type of forces are involved when deposited rock forms deltas or barrier islands?

PROBLEM: Density describes how much matter is in a certain amount of space.

SOLUTION:
What describes how much matter is in a certain amount of space?