Answer:
3 Option
Both the light-weight set of keys and the heavy blob of clay will fall at the same rate in a vacuum or in the absence of air resistance. This is known as the principle of equivalence, which states that in the absence of other forces, all objects near the surface of the Earth experience the same acceleration due to gravity. Therefore, the mass of an object does not affect its rate of free fall. This principle was famously demonstrated by Galileo in the 16th century when he dropped objects of different masses from the Leaning Tower of Pisa and observed that they reached the ground simultaneously.
Step-by-step explanation: