An industry is a cluster of firms that produces or sells similar or overlapping goods or services. These industries are usually grouped into sectors. Sectors can be large or small, but are generally classified into primary, secondary and tertiary. This classification is based on activities, business processes, and the products or services offered. It can also include the use of ...

A primary industry is a part of the economy which extracts, processes and utilises natural resources. These industries play a critical role in the livelihood and sustainability of humankind. Primary industries include agriculture, fishing, mining and forestry. They are also called the agricultural and allied sector. They use traditional and modern techniques to extract, process and utilise natural resources. Agriculture ...