Oil is formed by layers of sediment pushing down on decomposing algae, and earthy sediment of fine particles of rock and soil suspended in and carried by water. Given these facts, what is created when fine particles press down on algae among the following options:
- DDT
 - More algae
 - More fine particles
 - smog
 - urea
 - Water
 - Oil
 - gas


 

       Oil  