Which of the following activities is not considered as activities of Primary Sector?

None of the above

The correct answer is option 4: None of the above

The Primary Sector includes activities related to the extraction and direct use of natural resources.

• Mining involves extraction of minerals from the earth.
• Pisciculture refers to fish farming.
• Forestry involves the management and use of forests and forest products.

Therefore, all of these are activities of the primary sector.