According to the third law of motion,action and reaction

If action is always equal to the reaction,explain,why a cart pulled by a horse can be moved.

If someone jumps to the shore from a boat,the boat moves in the opposite direction. Explain.

Name and state the action and reaction in the following cases:
$(i)$ Firing of a bullet from a gun.
$(ii)$ Hammering a nail.
$(iii)$ $A$ book lying on a table.
$(iv)$ Moving rocket.
$(v)$ $A$ person moving on the floor.
$(vi)$ $A$ moving train colliding with a stationary train.

If a man jumps out from a boat to the bank of the river,the boat moves backwards. Identify the action and reaction in this situation.

$A$ jet engine works on the principle of Newton's: