Which of the following is an example of physical misconduct?

An example of physical misconduct encompasses actions that violate the physical well-being or safety of an athlete. Each of the options provided demonstrates a form of physical misconduct.

Throwing an object in frustration can create an unsafe environment for athletes and could potentially cause harm, reflecting a failure to uphold a standard of safety and respect.

Denying an athlete a water break as punishment is a direct violation of the athlete's health and hydration needs. This action puts the athlete at risk, highlighting a disregard for their physical safety and well-being.

Sending a concussed athlete back onto the field to play is a critical example of physical misconduct, as it disregards medical guidelines and the health of the athlete. It poses significant risks to the athlete's health, including further injury or long-term consequences.

Since each option represents a form of physical misconduct and indicates a negligence of care for athletes’ safety, the choice that includes all these instances accurately illustrates the pervasive nature of physical misconduct in sports settings. Thus, selecting "All of the above" encapsulates the essence of physical misconduct effectively.