Final answer:
Heavy weight lifting would best fit under the category of anaerobic activities on the physical activity pyramid.
Step-by-step explanation:
The activity of heavy weight lifting would best fit under the category of anaerobic activities on the physical activity pyramid.
Anaerobic activities are intense exercises that are performed for a short duration and do not rely on oxygen for energy. Examples of anaerobic activities include weight lifting, sprinting, and high-intensity interval training.
On the physical activity pyramid, anaerobic activities are placed above aerobic activities as they require higher levels of intensity and involve short bursts of energy.