Can you solve these physics riddles? ft Simone Giertz - Part 1/3

It is the heavier ball. At terminal velocity the force of gravity on the ball will be in equal magnitude to the force of air resistance, as the balls are not accelerating. We know that the force of gravity on an object is mass times g. Since the heavier ball has more mass, there is a greater force of gravity acting on it. This means it needs a larger force of air resistance to balance the force of gravity for a net force of 0, when the ball is at terminal velocity.