Answer: petroleum
Explanation:
Another name of crude oil is petroleum.
Crude oil is a naturally occurring, unrefined product of petroleum. It is composed of hydrocarbons and other organic materials. It is a fossil fuel which generate after millions of years of biological activity in the geosphere. These are produce by the underground decomposition of large amount of organic matter obtained from the death of the living organisms. It is a nonrenewable source of energy.
