Which of the following indicates warm water diving?

Warm water diving typically refers to diving in water temperatures that are comfortable for divers, usually allowing them to wear less thermal protection. The range identified as warm water diving is generally considered to be between 75°F and 85°F, which promotes a pleasant diving experience without excessive thermal protection.

The selection stating "above 88°F" does indicate a temperature that is very warm, but it is somewhat less commonly identified as the standard range for typical warm water diving. Most references to warm water suggest a slightly lower threshold, thus placing it in a more moderate frame. Meanwhile, temperatures below 70°F are generally considered cool or cold water, making those options unsuitable for identifying warm water conditions.

Therefore, the best description of warm water diving falls into the range between 75°F and 85°F, providing an optimal temperature for enjoyable and safe diving experiences.