These are the THREE body positions we get to on defense:
Ready Position : the body position achieved before the ball is hit, in general, the closer the defender is to the hitter, the lower and wider they are.
Fielding Position: the body position achieved when a defender is fielding/catching the ball, it is dependent on the type of ball hit, the position played , and the defensive situation.
Throwing Position: the body position achieved when a defender is prepared to throw, this can also changed based on the position played and defensive situation.