1. Static stretching
2. Dynamic stretching
3. Flexibility
4. Ballistic stretching
5. Joint
a. a place in the body where bones come together
b. the ability to use your joints fully through a wide range of motion
c. a series of quick but gentle bouncing by using momentum to force your joints beyond their range of motion
d. stretching slowly as far as you can until you feel a sense of tightness, then hold the stretch for at least 10 seconds
e. involves moving parts of your body and gradually increasing reach, speed of movement, or both

Joint is the place where two bones meet with each other. A human body has different types of joints like ball and socket joint, hinge joint, pivot joint etc. They help in different movements like walking, running, throwing, eating, etc in the body.
The joints are flexible in nature as they provide a whole range of motion to the body.
Stretching is an important part of exercising. Before the hard workouts are done, the muscles need to stretch and relax to get ready for the workout.
Static stretching involves slow stretching of the muscles and remaining in the same position for a certain duration of time.
Dynamic stretching involves moving parts of the body with increasing speed and distant reach.
Ballistic stretching involves a momentum to force the joints beyond their range of motion with acts like bouncing ,etc.