What should a face shield protect against while riding?

A face shield is designed to provide comprehensive protection for the rider's face while riding, serving as a barrier against a variety of environmental elements. The correct answer highlights that a face shield protects against wind, dust, dirt, rain, insects, and pebbles.

When riding a motorcycle, exposure to these elements can not only be uncomfortable but can also pose significant safety risks. Wind can cause strain on the rider's eyes and face. Dust and dirt can obscure vision, while rain can create a dangerous driving condition if it limits visibility. Insects can strike at high speeds, potentially causing injuries, while pebbles kicked up from the road can cause serious damage to the rider's face or eyes.

Thus, the face shield plays an essential role in enhancing safety and comfort on the road by minimizing these potential hazards. Other options, while they mention some protective elements, fail to encompass the complete range of potential dangers that a face shield effectively addresses.