An object that is moving must have a change in

A) its speed.

B) its position.

C) its acceleration.

D) its applied force.

b.

Motion is define as a change in its position. All the other answer might be changing, but do not have to be.

B) position

Explanation:

speed shows how much of a distance the object is moving per unit time position is the place where the object is located acceleration is the rate of change of velocity of an object with the time applied force here means the force that is acting on the object

moving object can have a constant speed, constant acceleration and no change in the applied force

(when there is no applied force on the object, it keep its motion uninterruptedly - Newton's first law of motion)

But if an object is moving, it must change its position as if it is still remain in the same position, there can never be a motion at all