Economic sectors are categories that help us understand how different parts of the economy function. The three main sectors are the primary sector, which involves extracting natural resources like farming and mining; the secondary sector, which focuses on manufacturing and construction, turning raw materials into products; and the tertiary sector, which provides services such as healthcare, education, and retail. Each sector plays a vital role in the economy. For example, the primary sector supplies the materials needed for the secondary sector to create goods, while the tertiary sector supports both by offering services that facilitate trade and improve quality of life. Understanding these sectors helps us see how economies grow and develop.