Answer: Plankton
Step-by-step explanation:
The fuels such as oils and natural gas are fossil fuels that is burnt to obtain energy. Old and dead organic matter( plankton, biomass, plants and animals) gets buried deep inside the ocean and compression takes takes place for over many years.
This process helps in the formation of the fossil fuels such as oils and natural gas. Its extraction takes place by squeezing of plankton.