Question

which source would best support an argumentative essay on the importance of protective gear for those playing sports? a medical journal on the causes of tennis elbow an interview with a professional golfer an editorial on the need for a community sports complex a case study of sports - related injuries

Explanation:

A case - study of sports - related injuries directly provides evidence of the need for protective gear by showing the consequences of not using it. A medical journal on tennis elbow focuses on one specific injury, an interview with a golfer may not be about protective gear, and an editorial on a sports complex is off - topic.

Answer:

a case study of sports - related injuries