Provide your best answer for the following question. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The question is: Carbon cycles through several Earth subsystems. Which sequence most directly leads to the cycling of carbon that can result in the formation of petroleum?
biosphere to lithosphere
Atmosphere > Plants > Animals > Fossilization > Petroleum.