TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Zero is the net force acting on an object when two equal forces are applied from opposite directions.

SOLUTION: What is the net force acting on an object when two equal forces are applied from opposite directions?

PROBLEM: A change of season and less food usually cause certain animals to migrate.

SOLUTION: Which two environmental changes usually cause certain animals to migrate?

PROBLEM: Found in many products, such as petri dishes, agar is made from mucilagnious material in this?

SOLUTION:
Found in many products, such as petri dishes, agar is made from mucilagnious material in this?