Laws of Motion — Science STD 10 — Question

If a body $A$ applies a force $F_A$ on a body $B$, then the body $B$ reacts with force $F_B$ on the body $A_{\text {, }}$ which is equal to $F_A$ in magnitude, but opposite in direction. $F_B=-F_A$ Eg:
(i) When birds fly they push the air downwards with their wings (Action) and the air pushes the bird upwards(Reaction).
(ii) When a person swims he pushes the water using the hands backwards (Action), and the water pushes the swimmer in the forward direction (Reaction).
(iii) When you fire a bullet, the gun recoils backward and the bullet is moving forward (Action) and the gun equalises this forward action by moving backward (Reaction).