Which one of the following statements best explains why the P‑wave of an earthquake arrives at a seismic station before the S‑wave? A) The P‑wave originates from the earthquake epicenter. B) The S‑wave originates from the earthquake focus. C) The P‑wave has a greater velocity than the S‑wave. D) The S‑wave decreases in velocity as it passes through a liquid.

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

Newtons laws of motion

We can infer that star y is closer but other factors must be considered include the heat of the star, the mass, and the brightness of the star. even though star x seems dimmer it may just be less bright or contains less heat.