Which precaution is recommended for Victor to reduce his risk of head injury?

Wearing a helmet while riding a bicycle is a crucial precaution that can significantly reduce the risk of head injury in the event of an accident. Helmets are specifically designed to absorb impact forces and protect the skull and brain. They can prevent or mitigate the severity of injuries such as concussions or skull fractures that may occur from falls or collisions. This safety measure is well-supported by research and guidelines from health organizations advocating for protective gear in activities prone to head injuries.

In contrast, options like riding on rugged terrain or maintaining a cluttered environment could potentially increase the risk of accidents rather than decrease them. Walking without support also poses a risk, particularly for those who may be unsteady or at risk of falls, highlighting the importance of safety measures that specifically address head injury prevention.