In what way is petroleum, a fossil fuel, distributed on Earth? (Is it evenly, with most places having very little,
unevenly, with some places having none
evenly, with most places having a lot
unevenly, but with all places having at least some)

“Years ago, when prehistoric animals and plants died, layers of rock and dirt gradually buried them. Over millions of years, heat and pressure from Earth's crust decomposed these organisms into one of the three main kinds of fuel: oil (also called petroleum), natural gas, or coal.”