The fossils changed locations. The area had a shift in climate. The land was once underwater. A glacier once covered the area.
I gave my students this multiple choice question: Which statement below best explains why several fossils of sea organisms were discovered buried deep in an area of dry land?

Only one answer is correct among these 4 choices:
- The fossils changed locations.
- The area had a shift in climate.
- The land was once underwater.
- A glacier once covered the area.

Could you tell me which one is correct?

The land was once underwater.