How does gravity affect projectile motion?

Hint:In this question we have to explain the effect of gravity on the projectile motion of the object. For this first we will understand the projectile motion then we will understand how gravity affects the projectile motion.

Complete step by step answer:
If an object is thrown or projected into the air, under the effect of gravity. This motion is called projectile motion and the object is called projectile. The path of the object moving in projectile motion is called trajectory.
There are always two components of projectile motion; Horizontal and vertical components. Gravity does not affect the horizontal motion of the projectile so the projectile travels with a constant velocity under the effect of acceleration due to gravity acting in downward direction.
 There is always an effect of gravity on vertical motion. The acceleration due to gravity affects the vertical component of projectile motion. The vertical velocity of the object changes by 9.8 m/s.
Result- Hence, from the above explanation we can clearly understand the effect of gravity on the projectile motion of an object.

Note:
Hence, we can understand that whenever we deal with projectile motion we have to make two components of the velocity of the object. Then we will make equations of motion of the object. Then we solve them to find the particular parameter asked to find in the question. In projectile motion we can calculate the time of flight, distance covered by the object on the ground it is also called horizontal range of projectile, maximum horizontal range of projectile, maximum height of projectile. These are called parameters of projectile motion.