Each of these questions has an assertion (A) and a reason (R).
Assertion (A): A parachute enables a person to descend safely from a height in case of an accident.
Reason(R): A parachute is made of a fabric with a limited air permeability and has a very large frontal area . When it falls through the air, it experiences heavy air resistance. The forces of lift and drag due to airflow balance the weight of the parachutist, so that the parachutist descends at a constant, slow speed.
Solution
A talks about parachutes enabling a person to descend from height at a slower and safer speed. Its explanation is correctly given by R, which talks about the material of a parachute and how the mechanism helps in descending at a slower speed. Hence, both statements are true and R is the correct explanation of A.
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