What is the purpose of wearing a motorcycle helmet?

Wearing a motorcycle helmet primarily serves to protect the head in case of an accident, which is its most critical and well-researched purpose. In the event of a crash, a helmet can significantly reduce the risk of severe head injuries and trauma by absorbing some of the impact and providing a protective barrier. Helmets are designed to meet safety standards, which ensure they offer essential cushioning and support to safeguard the skull and brain during unexpected events.

The other options may touch upon aspects related to riding, yet they do not address the core function of a helmet. For instance, while improved visibility can be beneficial, it is not the helmet's main role. Similarly, helmets do not function as a method to reduce wind resistance; rather, they can contribute to aerodynamic protection but ultimately prioritize safety. Lastly, while some riders may choose helmets based on style, this is secondary to their inherent protective capabilities. The primary goal of helmet use is unequivocally to enhance rider safety by minimizing the risk of head injuries.