To which of the following economic activities does weaving cotton into yarn belong?

Weaving cotton into yarn is classified as a secondary economic activity because it involves the transformation of raw materials into finished goods. In this case, the cotton (a raw material) is processed and turned into yarn, which is a manufactured product.

Secondary economic activities include all manufacturing processes, where raw materials are used to create products that are either consumed directly or further processed into other goods. This activity is distinct from primary activities, which involve the extraction of natural resources, such as agriculture or mining, or from tertiary activities, which relate to services rather than goods production. Quaternary activities involve knowledge-based services and research and development, which do not pertain to the physical transformation of materials. Thus, weaving cotton into yarn aligns with the definition of secondary economic activities as it emphasizes manufacturing and production.