Final answer:
For a moving object, the correct option is B) Acceleration, as it is the broad category encompassing any changes in velocity, including speeding up, slowing down, or changing direction.
Step-by-step explanation:
For a moving object, the only possible option among the given choices is B) Acceleration. This is because when an object is in motion, it can only be accelerating (either speeding up or slowing down), which answers the question. Rest is not an option since the object is already in motion, and constant velocity and deceleration are specific types of acceleration.
Therefore, when we consider a moving object, acceleration is the broad category that encompasses any changes in its velocity, including maintaining a constant speed in a straight line or changing direction. It's important to note that constant velocity is a special case of acceleration where the rate of change of velocity is zero, but since the object is already moving, 'rest' can be eliminated as a choice.
Using the kinematic equations, we can solve problems that involve motion at constant acceleration, for example, finding the final velocity of an object after a certain time period of acceleration.