Services are known as tasks that you pay other people to perform for you. An example would be the people who care for you at your doctor's office, the person cutting your hair at a salon or barbershop, or the waiter at your favorite restaurant. These are all examples of people demonstrating service.
There are two resources that economists differentiate from and that is between renewable and nonrenewable resources.
Renewable resource is a resource that can be use repeatedly because it is replaced naturally. For example, water and timber are renewable resources. Where as a nonrenewable resource cannot be quickly replaced by natural means.