The oil and gas reserves we use for energy were formed from aquatic organisms millions of years ago, via processes similar to those forming peat and coal. based on what you've learned about npp, decomposition, and fossil fuel formation, where do you expect these aquatic organisms to have lived and died? a. tropical river systems b. shallow temperate lakes fed by fast-moving streams c. oceans and seas (accumulating on the sea floor) d. subarctic lakes