Which of the following is classified as a nonrenewable resource?

Copper is classified as a nonrenewable resource because it is a finite natural metallic element found in the earth's crust. Once extracted and used, it cannot be replenished on a human timescale. The formation of copper deposits takes millions of years, and once the existing reserves are depleted, they cannot be replaced within our time frame of resource management. This contrasts with renewable resources, which can be naturally replenished in a short period, such as through natural processes for wood and biomass or through the water cycle for water. While recycling can extend the life of copper, the current supply ultimately comes from limited natural deposits, categorizing it as nonrenewable.