Final answer:
Aerobic exercise is physical activity that involves sustained movements like running or cycling, using oxygen to meet energy demands over extended periods, and improves cardiovascular endurance.
Step-by-step explanation:
This type of activity that means in the "presence of oxygen" and is an activity for which the body is able to supply adequate oxygen to sustain performance for long periods of time is known as aerobic exercise. Examples of aerobic physical activity include medium to long distance running/jogging, swimming, cycling, and walking. These exercises use a relatively high percentage of slow-twitch muscle fibers and consume large amounts of oxygen, thereby increasing cardiovascular endurance.