2 Answers

A resource is something that can be used for support or help. 

The local library is a valuable resource.

A resource is a source or supply from which benefit is produced. Typically resources are materials or other assets that are transformed to produce benefit and in the process may be consumed or made unavailable. From a human perspective a natural resource is anything obtained from the environment to satisfy human needs and wants.[1] From a broader biological or ecological perspective a resource satisfies the needs of a living organism (see biological resource).[2]
The concept of resources has been applied in diverse realms, including with respect to economics, biology, computer science, land management, and human resources, and is linked to the concepts of competition, sustainability, conservation, and stewardship. In application within human society, commercial or non-commercial factors require resource allocation through resource management.
Resources have three main characteristics: 1) utility, 2) limited availability, and 3) potential for depletion or consumption. Resources have been variously categorized as biotic versus abiotic, renewable versus non-renewable, and potential versus actual, along with more elaborate classifications.

Source:  WIKIPEDIA