What are subsistence activities?

Subsistence activities are those that provide the bare essentials for living: food, water, and shelter.

For most of prehistory, primitive humans were hunter-gatherers who had to migrate in search of food. Some did use caves and natural shelters to remain in areas where there was ample food and game. Eventually they progressed to building structures such as tents, and later more durable homes of earth, wood, and stones.