Final answer:
An aerobic activity is one that increases heart rate and breathing rate. Surfing the web is not an aerobic activity as it does not require physical exertion.
Step-by-step explanation:
An aerobic activity is one that increases your heart rate and breathing rate, and requires a sustained effort over a period of time. Swimming, playing basketball, and biking are all examples of aerobic activities because they require continuous movement and use large muscle groups. However, surfing the web is not an aerobic activity because it does not require physical exertion or increase heart and breathing rates.
Learn more about Aerobic activities