Final answer:
Aerobic exercise is the type of rhythmic activity that uses large amount of oxygen and works heart and lungs. It includes activities like running, swimming, cycling which increase your breathing and heart rate.
Step-by-step explanation:
The exercise that involves rhythmic activities, using large amounts of oxygen and significantly works the heart and lungs is Aerobic exercise. Aerobic exercises, also known as cardio exercises, include activities like running, swimming, cycling, etc. these exercises increase your breathing and heart rate, improving the health of your heart, lungs and circulatory system.
In contrast, Anaerobic exercise, such as weightlifting or sprinting, involves quick bursts of energy and is performed at maximum effort for a short time. This type of exercise doesn't rely heavily on oxygen and doesn't benefit the heart and lungs as much as aerobic exercise. 'Frequency' and 'intensity' are terms used to describe the regularity and level of effort exerted during a workout, respectively.
So, the answer to your question is A) aerobic exercise. It is the activity that uses lots of oxygen and works your heart and lungs the most.
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