Final answer:
Shale gas is not a fossil fuel, while coal, oil, and natural gas are.
Step-by-step explanation:
The choice that is not a fossil fuel is E) Shale gas.
Fossil fuels are energy sources that formed over millions of years from dead plants and produce pollutants and greenhouse gases when burned. The three main types of fossil fuels are coal, petroleum (oil), and natural gas.
Shale gas, on the other hand, is a type of natural gas that is trapped within shale rocks. It is extracted using a process called hydraulic fracturing or fracking.
While shale gas is a type of natural gas, it is not considered a traditional fossil fuel like coal, oil, and natural gas. Shale gas is a newer source of energy that has gained attention in recent years, but it is not classified as a fossil fuel.