Which of the following best describes where fossil fuels come from?
a. decayed animals
b. the hardening of nitrogen oxides
c. decayed plant material
d. the merging of iron, lead, and zinc

Drag the tiles to the boxes to form correct pairs. match the causes with their effects cause: tectonic plates at transform boundaries experience friction. cause: tectonic plates at transform boundaries experience friction. cause: earth is covered by a crust that runs miles deep.