Aerobic describes physical activity for which the body can supply enough oxygen to keep doing the activity for long periods of time?

Answer 1

from Internet:

Aerobic exercise (also known as endurance activities, cardio or cardio-respiratory exercise) is physical exercise of low to high intensity that depends primarily on the aerobic energy-generating process. "Aerobic" is defined as "relating to, involving, or requiring free oxygen", and refers to the use of oxygen to meet energy demands during exercise via aerobic metabolism adequately.