Which of the following is a nonrenewable resource?

a. River

b. Gold

c. Carbon

d. Tree

The answer is gold.

Gold is a nonrenewable resource because most nonrenewable resources are minerals and gold just so happens to be a mineral.

Answer;

Gold

Gold is a non renewable resource.

Explanation;

Non renewable resources are those resources of economic value that can not be readily replaced by natural means on a level that is equivalent to its consumption.

Examples of non renewable resources include; fossil fuels such as oil, natural gas and coal; because their source is not sustainable.