Help physics...Defined as the continuous change in the position with respect to a certain reference point?

Here the choices..


a. Static


b. Kinematics


c. Mechanics


d. Motion

Help physics...Defined as the continuous change in the position with respect to a certain reference point?
I'd say D - motion.
Reply:its (d) motion or rather i would like to call it velocity which is the rate of change of position of a particle with time with respect to a fixed refrence point.