If marine fossils are in the interior of a continent because it used to be covered by water, then why are marine fossils in the interior of a continent?

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

 

  It used to be covered by water        