Since Dinosaurs left behind fossils of their bodies in the earth so here the fossil fuels should be can be used to fuel like the coal.
It should be made from plants decomposition and the animals. It is to be found in the crust of the earth and it comprises carbon and hydrogen that should be burned for energy.
Also, along with the usage of the fossil fuel so it should be used for the remaining of something that lived in a fuel.
Learn more about fossil fuel here: https://brainly.com/question/12004410