You are presented with the question "Fossils are formed when remains of living things are what?" and the following answer choices: 
- buried in mud
 - break off
 - covered over time
 - Physical weathering
 - By coral exoskeletons
 - It remains dormant
 - saved in a box
 - kept in the dark

Now knowing that fossils are formed when layers of sediment cover the remains of organisms over time and fossil fuels are formed from the remains of once living organisms that depended on light, choose the best answer.


 

   covered over time      