Question

explain the third law and its consequences on motion

Answer 1

Every action has an equal an opposite reaction.
For any object to gain or lose energy, it must interact with another body through some medium. Be it a ball flying through air, slowing down from drag, or the same ball bouncing off a wall.
What this is saying, is that the ball is losing energy in the form of velocity by pushing against air or the wall.
Another easy example is a pool table. If you hit the cue ball against the black ball, they both bounce away from each other. Sometimes the cue ball will suddenly stop, and the black ball will move away, sometimes they will split off, etc. This depends on the angle at which they hit one another.
Long story short, the third low only refers to objects transferring energy, and not allowing for it to disappear, thus satisfying the conservation of energy law.