You are presented with the question "Oil is formed when sediment layers push on what sort of algae?" and the following answer choices: 
- coral
 - living
 - rich
 - healthy
 - dead
 - life
 - fungi
 - peat

Now knowing that oil is formed by layers of sediment pushing down on decomposing algae and when the algae die they decompose, choose the best answer.


 

     dead    