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. Given these facts, fossils are formed when remains of living things are what among the following options:
- buried in mud
 - break off
 - covered over time
 - Physical weathering
 - By coral exoskeletons
 - It remains dormant
 - saved in a box
 - kept in the dark


 

   covered over time      