What existed originally that became the deposits of fossil fuels? a vast amounts of plant life that existed before dinosouars b. lots of tiny mammals from the time before the dinosuars c. plants that died a few thousand years ago d. the dinosouars

The correct answer would be A vast amounts of plant life that existed before dinosouars.

Fossil fuels are fuels such as natural gas, coal, petrol, et cetera which are formed naturally by the decomposition of remains of dead plants and animals.

When dead remains are decomposed and are present at high pressure and temperature, they are converted into fossil fuels.

They process usually take around million of years.

b

is correct hope this   also i learnd this in middle school