What is the primary purpose of wearing a life jacket while boating?

Wearing a life jacket while boating is primarily focused on safety, specifically to prevent drowning. Life jackets are designed to provide buoyancy and keep individuals afloat in case they fall overboard or are otherwise submerged in water. This is particularly critical in emergency situations where the risk of drowning is elevated, such as in rough waters, poor weather conditions, or if the boater is incapacitated.

While other options mention aspects that could be associated with life jackets, such as comfort or warmth, these are secondary to the device's fundamental role as a safety measure. The primary function is to enhance survival in aquatic environments, making option B the most appropriate answer. It highlights the essential purpose of life jackets in protecting individuals from the life-threatening risks posed by water.