What does "Es obligatorio el chaleco salvavidas" mean?

The phrase "Es obligatorio el chaleco salvavidas" translates to "A life jacket is required." This statement explicitly indicates that wearing a life jacket is not just recommended but mandatory, denoting a legal or safety requirement. Understanding this phrase is crucial, especially in contexts related to safety regulations in water activities or boating, where the use of a life jacket can significantly reduce the risk of drowning. The other choices do not reflect the meaning of the phrase; for instance, phrases suggesting caution or directing actions like "Be careful," "Watch out," or "Turn right" relate to general awareness or navigation rather than the specific requirement of safety equipment like a life jacket.