What is the primary purpose of a life jacket in water activities?

The primary purpose of a life jacket is to ensure buoyancy and safety while engaging in water activities. Life jackets are designed to provide flotation to keep the wearer afloat in the water, which is crucial in emergencies such as falling overboard or capsizing. This ability to remain buoyant significantly reduces the risk of drowning, thereby enhancing overall safety during activities such as boating, kayaking, or swimming.

While other options might touch upon aspects related to water activities, such as style or comfort against sun exposure, these do not address the life jacket's essential role in promoting safety through buoyancy. The focus of a life jacket is solely on preserving life and preventing accidents in aquatic environments.