Air friction acting on a falling object is :

Correct option is B

The correct answer is opposite to gravity.
Gravity is a fundamental force of nature that governs the attraction between objects with mass or energy. It is responsible for the phenomenon where objects with mass are drawn toward each other. Gravity is the force that gives weight to physical objects and influences their motion and behavior.
When an object falls through the air, it experiences the force of gravity pulling it downward. At the same time, it also experiences air resistance or air friction acting in the opposite direction to the motion of the object. Air resistance is caused by the collision between the object and air molecules as it moves through the air. This collision generates a force that opposes the motion of the object. The magnitude of air resistance depends on various factors, including the size, shape, and velocity of the object. Since air resistance acts in the opposite direction to the motion, it is opposite to the force of gravity, which pulls the object downward. The force of gravity acts vertically downward, while air resistance acts opposite to the direction of motion, effectively slowing down the object's fall.