Oil and natural gas (aka Fossil Fuels) are produced from ...

Group of answer choices

Dead dinosaurs

Dead swamp ferns

Dead algae/plankton

An inorganic substance

Dead algae/plankton

Over millions of years, layer after layer of sediment and other plants and bacteria were formed. Stage 2 - As they became buried ever deeper, heat and pressure began to rise. The amount of pressure and the degree of heat, along with the type of biomass, determined if the material became oil or natural gas.