6. newton's first law of motion addresses a body at rest or in motion. what is inertia's role in newton's first law of motion? a. it determines how much mass the object retains. b. it's associated with the acceleration of the object. c. it's the tendency for the body to change motion quickly. d. it's the tendency for the body to resist a change in motion

The correct answer is "It's the tendency for the body to resist a change in motion".

Explanation:

Newton's First Law of motion addresses a body at rest or in motion. This law is also known as "Law of inertia".

Inertia resists any change in the state of the object. Mass is a measure of inertia.

If the object is in motion then it remains in this state or if the object is at rest then it remains in this state unless the external force is applied.

If the object is moving with constant velocity then it will remain moving with this velocity unless it is accelerated.

Suppose, bus driver applies suddenly applies brake. The passenger sitting inside the bus falls forward. It is due to inertia. As the passenger does not want to change its state. It resists this change. The upper part of the body wants to remain in the state of motion. It's the tendency for the body to resist a change in motion

Therefore, the correct option is (D).