Which phrase is used to explain the importance of life jackets?

The phrase that highlights the importance of life jackets is centered around safety during water activities. Specifically, the correct choice emphasizes that it is crucial for individuals to always wear a life jacket. This statement signifies that life jackets are essential for preventing drowning and ensuring that people are safe when they are on or near water, aligning with best practices in water safety.

In contrast, the other options focus on different subjects: one mentions the importance of wearing a hat, another discusses the need for a paddle, and the last one refers to following rules generally. While these topics are relevant in other contexts, they do not convey the critical safety message regarding life jackets. Hence, the selected phrase clearly underscores the necessity of life jackets, making it the most appropriate choice for highlighting their importance in water safety.