Answer:
Services industries
Step-by-step explanation:
According to the textbook, Justin's in peanut butter, Rover in dog care, and Zagster in bike sharing are examples of entrepreneurial firms who are exploiting opportunities in Services industries.
A service industry consists of providing services to people as their product. they sell services by utilizing human capital and earn profit through it. For example Rover provides dog care which is a service, Zaster provides his bike for sharing. Therefore it falls in the services industry.