Statement 1: Coal, petroleum, natural gas are all fossil fuels.
Statement 2: They are called fossils as they are made from the dead remains of organic matter.
Statement 1 and statement 2 are correct , statement 2 is the reason for statement 1.
Coal, petroleum and natural gas all comprises fossil fuels and they are called fossils because they are made from the dead remains of organic matter. When the dead remains are buried deep under the earth and with huge pressure and temperature, gets converted into fossil fuels.