The energy originated from the animal when it was alive
Coal. -from my dad lol ill check
B) A long time increase in the Earths Average temperature
The most common elements present in organic compounds are carbon, hydrogen, oxygen, and nitrogen.
1.Tyrannosaurus Rex Lived in the Mesozoic Era
2.The largest mass extinction happened in the Paleozoic Era
3.Life exploded for the first time in the Precambrian Era
4.The Chicxulub crater in the Cenozoic Era