Solution:Transport, Communication and Commerce come under the tertiary activities. The tertiary (service) sector covers a wide range of activities from commerce to administration, transport, communication, financial and real estate activities, business and personal services, education, health and social work etc.Primary activities are directly dependent on the environment as these refer to utilisation of earth's resources such as land, water, vegetation, building materials and minerals. It, thus includes hunting and gathering, pastoral activities, fishing, forestry, agriculture, and mining and quarrying. People engaged in primary activities are called red-collar workers due to the outdoor nature of their work.
Secondary activities add value to natural resources by transforming raw materials into valuable products. Secondary activities, therefore, are concerned with manufacturing, processing and construction (infrastructure) industries. People engaged in secondary activities are called blue-collar workers.
Rural activities primarily revolve around agriculture, but also encompass a wide range of non-farm livelihoods. These activities, often linked to land-based resources, play a crucial role in the economic and social fabric of rural communities.