Read this introduction to a magazine article.

Summertime is near, and the lifeguard’s whistle beckons. It is almost time for the swimming season. Of course, with swimming season comes slippery pool decks and shallow water at the end of some docks. And there are always a few swimmers who overestimate their skills or underestimate their fatigue.

What will most likely be included in the magazine article that follows this introduction?

the benefits of swimming
a technical description of strokes
water-safety suggestions
water-centered vacation destinations