Which of these sets of economic activities is completely primary?

The set of economic activities that is completely primary is the one that includes Fishing, Lumbering, Farming, and Mining. Primary economic activities involve the extraction and collection of natural resources, and these four activities all fit within that definition. Fishing involves the capture of fish and other marine life, lumbering involves the cutting and collection of trees, farming involves the cultivation of crops and livestock, and mining involves the extraction of minerals and other valuable materials from the earth. The other sets of economic activities mentioned in the options include activities that are not considered primary. Transportation, manufacturing, and banking are all secondary or tertiary economic activities, as they involve the processing, distribution, and management of resources rather than their direct extraction. Trade is also not considered a primary activity, as it involves the exchange of goods and services rather than their direct production or extraction.