What term refers to a source or supply of support?

The term that refers to a source or supply of support is "Resource." In various contexts, resources can include natural materials, financial assets, or even human skills that contribute to meeting needs or achieving goals. Resources are often seen as vital components in ecosystems, economies, and various industries, including fisheries and water management in aquatic science.

While “asset” can also refer to something valuable that can be used to support efforts, it typically implies ownership and a legal or financial context, which may not encompass broader types of support. “Supply” refers more specifically to the availability of materials or goods rather than that supportive role as a general concept. “Product” denotes something that is manufactured or created for sale, rather than a source of support. Thus, "Resource" encompasses a wider range of supportive elements, making it the most appropriate answer.