Name and explain the three levels of economic activity

the three levels of economic activity are associated with the primary sector include agriculture, mining, forestry, farming, grazing, hunting and gathering fishing and quarrying.

There are actualy four levels of economic activity.
Primary- Activity that uses the Earth's natural resources. Examples include farming, fishing, mining, ect.
Secondary- "Less developed" countries begin to manufacture products from primary industries.
Tertiary- Provide services to primary, secondary industries, communities, and individual consumers.
Quaternary- Economies have reached the technical level. People are involved in jobs such as information research, management, and administration.