Concept:Economic activities are classified into primary, secondary, and tertiary sectors based on the nature of the production process.
Explanation:Primary production involves extracting raw materials from nature, such as farming or mining.
Secondary production involves manufacturing and processing raw materials into finished goods.
Tertiary production involves providing services to businesses and consumers.
Warehousing is a service that provides storage and distribution facilities to other businesses.
Since warehousing does not extract or manufacture goods but offers a supporting service, it belongs to the tertiary sector.
Answer:C. tertiary production