Oil is formed by layers of sediment pushing down on decomposing algae, and when the algae dies it is decomposed by bacteria. Given these facts, oil is formed by layers of sediment pushing down on what among the following options:
- bacteria
 - nutrients
 - amoebae
 - tunicates
 - oysters
 - coral reefs
 - mussels
 - Bodily water


 

 bacteria        