Question

fossil fuels are preserved in the earth crust​

Answer 1

$fossil \: fuels \:are \: \\ formed \: over \: thoundsands \\ \: of \: years \: when \: dead \: plants \: and \\ \\ animals \: are \: buried \: under \: </p><p>earth \: over \: thousands \: of \: years \: \: they \: are \: changed \: into \: fossil \: fuels$