You are presented with the question "Why are marine fossils in the interior of a continent?" and the following answer choices: 
- erosion from rivers
 - It used to be covered by water
 - They evolved to be land animal
 - basic building blocks of life
 - They washed ashore
 - the wearing away of rock
 - Land animals ate them
 - units of heredity

Now knowing 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 marine fossils found in the interior of the continent, choose the best answer.


 

  It used to be covered by water       