Which of the following activities is considered aerobic?

Cycling is considered an aerobic activity because it involves sustained, rhythmic movement that elevates the heart rate and improves cardiovascular endurance. Aerobic exercise is characterized by the body's use of oxygen to generate energy over an extended period. Cycling engages large muscle groups and can be performed at various intensities, making it an excellent choice for improving overall endurance and fitness levels.

In contrast, weightlifting primarily focuses on anaerobic strength training, which involves short bursts of high-intensity effort and does not rely on oxygen in the same way as aerobic exercises. Sprinting, while it can elevate the heart rate, typically operates in anaerobic capacity due to its short duration and high intensity. Jumping, similar to sprinting, can be high-intensity and may not provide the sustained effort required for an aerobic classification. Therefore, cycling stands out as the most suitable example of an aerobic activity among the options provided.