Exposure to which of the following increases the risk of traumatic brain injury?

Multiple blast events are linked to a higher risk of traumatic brain injury due to the unique dynamics of blast forces. These explosions create waves of pressure and can lead to concussions or more severe brain injuries even without direct impact. Active combat environments often expose personnel to these multiple blast scenarios, which can compound the risk of injury, particularly in individuals who may already have sustained a brain injury from a previous blast.

In contrast, while excessive sunlight, low-impact falls, and swimming accidents can lead to various injuries, they do not specifically elevate the risk of traumatic brain injury in the same way multiple blasts do. Sunlight exposure is primarily a concern for skin conditions, and while falls can cause head injuries, they typically lack the intense, multi-directional forces seen in blast situations. Swimming accidents may pose drowning risks or injuries from collisions, but they do not carry the same cumulative risk factor for brain trauma that multiple blasts do.