When light travels from air into water which is more dense than the air , it’s speed is lower. So the light wave will
A. bend towards the normal to the surface
B.-always lies along the normal to the surface
C. be unaffected
D. bend away from the normal to the surface

D. Bend away from the normal to the surface

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.