Final answer:
Baseball/Softball is the youth sport that constitutes 2.8% of concussions. Wearing protective gear and recognizing symptoms like headache and drowsiness can help manage the risks associated with this brain injury.
Step-by-step explanation:
The youth sport that constitutes 2.8% of concussions is B) Baseball/Softball. Concussions are considered the mildest and most common type of brain injury, often resulting from playing contact sports. While sports such as football, soccer, and hockey may have higher occurrences of concussions due to their nature, baseball and softball also pose risks for such injuries, albeit at a lower percentage. It's important for young athletes to wear appropriate protective gear and to be aware of the symptoms of a concussion, which include headache, drowsiness, and confusion.