Final answer:
Copper is not a fossil fuel; it is a metal and does not come from ancient biological materials like coal, petroleum, or natural gas.
Step-by-step explanation:
The resource from the options provided that is not a fossil fuel is copper (1). Fossil fuels are natural resources that formed from the remains of ancient organisms and are used for energy.
Examples include petroleum (2), coal (4), and natural gas (3). Copper, however, is a metal and not derived from ancient biological material.
Unlike fossil fuels, which can take millions of years to form and are considered nonrenewable because of the timescale required for their formation, metals like copper are simply mined and processed.
It's important to note that fossil fuels, when burned, release CO2 that has been long stored underground, contributing to current greenhouse gas levels, whereas metals do not.