What Did fossil fuels actually got their energy from?

Fossil fuels, such as coal, oil, and natural gas, derive their energy from ancient organic matter, primarily plant and marine organisms, that lived millions of years ago. Over time, heat and pressure from geological processes transformed this organic material into hydrocarbons. The energy stored in fossil fuels originates from the sun, as plants capture solar energy through photosynthesis, which is then stored in their biomass. When fossil fuels are burned, this stored energy is released in the form of heat, which can be harnessed for various energy needs.