Which of the following examples illustrates Newton’s second law of motion?

Question 4 options:

Much less force is required to push an empty shopping cart than a full shopping cart.

When a car driver has to brake suddenly, all passengers continue moving forward unless restrained by the seatbelt.

A balloon flies in the opposite direction as the air that's rushing out of it.

A ball thrown in space will continue forever since there's no outside force to slow it down.