Explanation:

- Primary industries: These involve the extraction and production of raw materials. Examples are agriculture, mining, and fishing. They are the foundation of economic activity but do not provide support services to other industries.

- Secondary industries: These include manufacturing and construction. They take raw materials produced by primary industries and transform them into finished goods. While critical, they too don't mainly provide support services.

- Commercial industries: This is not a standard category in industry classification. Typically, commerce involves trade and business activities rather than a specific industry type.

- Tertiary industries: These are the service industries which provide support and services to primary and secondary industries. Examples include transportation, finance, and healthcare.