The fossils changed locations. The area had a shift in climate. The land was once underwater. A glacier once covered the area.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which statement below best explains why several fossils of sea organisms were discovered buried deep in an area of dry land?
Possibilities:
- The fossils changed locations.
- The area had a shift in climate.
- The land was once underwater.
- A glacier once covered the area.

The land was once underwater.