Industrial sectors refer to distinct categories of economic activities that produce goods or services. These sectors are typically classified into three main groups: primary (extraction of natural resources), secondary (manufacturing and construction), and tertiary (services). Each sector plays a crucial role in the economy, contributing to employment and overall economic growth. The primary sector includes industries like agriculture, mining, and forestry, which provide raw materials. The secondary sector transforms these materials into finished products, such as automobiles and electronics. Finally, the tertiary sector encompasses services like healthcare, education, and retail, which support both the primary and secondary sectors.