You are presented with the question "What forms when plants are covered in layers of sediment over time?" and the following answer choices: 
- Conifers
 - watershred
 - fossils
 - H2O
 - Echinoids
 - bubbles
 - loose soil
 - bones

Now knowing that fossils are formed when layers of sediment cover the remains of organisms over time and plants and animals are organisms, choose the best answer.


 

   fossils      