Which of the following activities should an athlete avoid while recovering from a concussion?

During recovery from a concussion, an athlete should avoid high-impact sports because such activities can significantly increase the risk of further injury. A concussion involves a traumatic brain injury, and engaging in high-impact sports exposes the athlete to situations where they might receive another blow to the head, potentially worsening their condition or delaying healing.

Resting and sleeping are crucial components of recovery, allowing the brain to heal. While playing video games and studying for exams might create cognitive stress, they are not as physically dangerous as participating in high-impact sports. Thus, it's essential to steer clear of any activity that could put the athlete at risk of another concussion or exacerbate symptoms.