Which best describes how petroleum is formed? (1 point) Responses Layers of rock are built up over millions of years, putting pressure on each other. Layers of rock are built up over millions of years, putting pressure on each other. Remains of dead organisms are put under extreme pressure by layers of rock. Remains of dead organisms are put under extreme pressure by layers of rock. Rocks are broken down over hundreds of years by natural forces like water. Rocks are broken down over hundreds of years by natural forces like water. Metals and rocks are put under extreme pressure and heat.