Fact 1: Heat and pressure change the remains of prehistoric living things into natural gas. Fact 2: Natural gas is a fossil fuel. Given the two facts above, heat and pressure upon fossils creates what?
pick from the following.
1). snow.
2). energy.
3). food.
4). ecosystems.
5). erosion.
6). fossil fuels.
7). forces.
8). Energy..
6).