Answers are -
A the pull of Box B on the wire
B the pull that string S exerts on Box A
C the pull that box B exerts on string S
D the pull that string S exerts on box B
E the force that box A exerts on box B

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Ithink it is c ,i hope i you

The disturbance in a transverse wave is perpendicular to the wave motion.unlike a transverse wave, the disturbance in a longitudinal wave is parallel to the wave motion (a), that is, back and forth.

Gravity, from the center of mass of the box, extending downward normal force, from the floor under the box, extending upward, equal to gravity push force, acting at a point on the box, extending in the direction of motion friction, acting at any point on the box directly opposite the push, extending directly opposite to the motion