What are the three main sectors of industry?

The three main sectors of industry are Primary, Secondary, and Tertiary.

The Primary sector involves the extraction and harvesting of natural resources, such as agriculture, mining, forestry, and fishing. This sector is fundamental because it provides the raw materials that other industries rely on for production.

The Secondary sector focuses on manufacturing and construction. It takes the raw materials obtained from the Primary sector and transforms them into finished goods or products. Industries in this sector include manufacturing plants, construction companies, and food processing businesses.

The Tertiary sector entails the provision of services. This includes industries such as retail, healthcare, education, hospitality, and finance, which do not produce goods but offer services to consumers and businesses. This sector has become increasingly significant in modern economies as services often provide more employment than goods production.

The other options mention Quaternary, which relates to knowledge-based activities involving services like research and development, but it is not one of the three main sectors. Thus, the emphasis on Primary, Secondary, and Tertiary effectively captures the core structure of industry sectors.