What does 'chaleco salvavidas' refer to in English?

The term 'chaleco salvavidas' translates to 'life jacket' in English. A life jacket is a buoyant device designed to help a person stay afloat in water, especially in emergency situations. It is specifically worn to provide safety while engaging in water-based activities such as boating, swimming, or other maritime situations where there is a risk of drowning.

The terminology originates from Spanish, where 'chaleco' means 'vest' and 'salvavidas' translates to 'life-saving', emphasizing its function as a protective garment that can literally save a person's life in the event of an accident in or near water. The other choices do not align with this definition. A waterproof case is related to protection against water damage, a leash is used for securing pets, and a dry bag is for keeping contents dry, but none provide the safety features associated with a life jacket. Thus, 'life jacket' is the most accurate translation for 'chaleco salvavidas'.