You are presented with the quiz "What type of material is a fossil formed?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "if fossils of a water animal or plant are found in a place then that place used to be covered by water in the past" and "most fossils are formed when sediment is deposited by wind or water". 

So, what's the best answer to the question?


 

        In sediment   