Correct Answer - Option 3 : Newton's third law

**Explanation:**

There are three laws of motion given by Newton:

**1.** **Newton’s 1st law** states that a body at rest or uniform motion will continue to be at rest or uniform motion until and unless a net external force acts on it.

**2. Newton’s 2nd law** states that the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

**3.** **Newton’s 3rd law** states that for **every action there is an equal and opposite reaction.**

**Note:**

According to the statement of Newton's 3rd law, the **magnitudes of the reactions are such that the applied loads are exactly counteracted** because if a load is applied then an equal and opposite reaction is generated to balance or counteract the effect of the applied load.