Which of the following is an example of an energy drink?

Red Bull is an example of an energy drink because it specifically contains ingredients intended to boost energy and alertness. This includes caffeine, taurine, various B vitamins, and sugar or artificial sweeteners, all of which are formulated to enhance physical and mental performance. Energy drinks are designed to provide a quick source of energy, often marketed towards individuals seeking a boost during activities that require increased alertness or stamina.

In contrast, the other options—Pepsi, Sprite, and Dr. Pepper—are primarily soft drinks that offer sweetness and carbonation but do not typically contain significant levels of caffeine or other stimulants found in energy drinks. They are formulated more for refreshment and taste rather than energy enhancement.