Why are gravitational forces or spring forces considered conservative forces?

(N/A) force is called a conservative force if the work done by or against it in moving a particle between two points is independent of the path taken.
$1$. When an external force does work in moving a body against a conservative force (like gravitational or spring force),this work is stored as potential energy.
$2$. When the external force is removed,the body moves by converting this stored potential energy back into kinetic energy.
$3$. Throughout this process,the total mechanical energy (sum of kinetic and potential energy) remains constant.
Since the work done depends only on the initial and final positions and not on the path,these forces are classified as conservative forces. Examples include gravitational force,spring force,and electrostatic force.