Which of the following factors affect intensity of lower body plyometric drills?

Speed dictates the rate of force development and ground contact time, height of the drill (such as box or jump height) determines the impact force at landing, and body weight directly scales the gravitational load throughout the movement - these three variables are the primary determinants of lower body plyometric intensity as defined by the NSCA strength and conditioning framework.

Range of motion and reaction time are performance characteristics that describe how an athlete moves, not variables that scale the mechanical intensity of the drill itself.

Strength and flexibility are athlete attributes rather than drill intensity factors; while points of contact does influence intensity, this combination does not represent the standard intensity classification framework.

Athlete strength is a capability factor that influences performance outcomes but does not independently scale the mechanical load imposed by the drill, and reaction time does not determine drill intensity.