Imagine that you have caught the ball out in front of you. You would then absorb the momentum of the ball by bringing in the ball to your chest, bending the knees. This also helps to protect the ball from defenders and gives you a stable platform.
Bringing the ball up your chest in an upward arc, release the ball out level with your chest, arm outstretched.
Rebounding is the least glamorous thing in basketball and one of the most decisive. It is also almost entirely a habit, which means it is entirely coachable.
Good spacing is only the start. The best modern offences teach players to attack the defence's rotations and play in a permanent 4-on-3 - here is how to coach that read.
The ball screen produces almost half of all professional offensive possessions, yet most teams still teach it as a memorised play. The modern approach trains the read - giving players a framework to decide based on what the defence does, not what the coach called.