What asphalt coal and petroleum are made from the remains of living organisms what are they considered to be?

Asphalt, coal, and petroleum are considered fossil fuels because they are derived from the remains of ancient living organisms, such as plants and marine life. Over millions of years, heat and pressure transformed these organic materials into carbon-rich substances. Fossil fuels are primarily used as energy sources due to their high carbon content, which can be combusted to release energy.