Crude oil - simple terms, simple words

Crude oil 

                    As we all know that  fuels are extracted from crude oil, what is crude oil exactly where did we get them?

                    Crude oil is a mixture of Hydrocarbons, which we generally found in the natural reservoirs. This crude oil was first successfully drilled by Col. Edwin Drake in a well through rock.

Uses 

       The Crude oil has its main use as contribution to fuels for bikes, cars, motors and engines etc.,