Health care, business, retail, and education are examples of [ ] industries.

The answer is service. This is the tertiary sector of the economy. The service industries include the running of services to trades as well as final customers. Such services include secretarial, tradesmanship (like mechanic or plumbing), computer services, eateries, travel, etc.

The answer is service industry

These are industries where you provide a service, you don't manufacture anything. For example, in the automobile industry you manufacture cars. In the health care industry, you provide a service because what they are giving you in exchange for money is not something tangible or manufactured. Internet service providers for example do the same thing.