It was once a hot desert. It was once a shallow sea. It was once part of a glacier. It was once part of a rain forest.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Students on a field trip discovered fossilized shark teeth on the side of a cliff. Which conclusion can best be made about the history of the area?
Possibilities:
- It was once a hot desert.
- It was once a shallow sea.
- It was once part of a glacier.
- It was once part of a rain forest.

It was once a shallow sea.