Explain how fossil fuels are formed from living organisms on land and in sea.

The substances that make up plankton and plants are converted into fossil fuels. Plankton breaks down into natural gas and petroleum, while plants are turned into coal. As it is now, by coal mining and exploration of oil and gas wells on land and offshore, humans harvest these resources.

Iam not sure but to me it with be a or dsorry if i was late! hope this ! : )if you really want me to find out the answer that is correct tell me and i will do more research but the a or d makes sense to me.