only organisms that lived in the sea only organisms that lived on land only organisms that lived in the air organisms that lived on the land, in the sea and in the air
I gave my students this multiple choice question: The fossils that are found in the oldest layers of sedimentary rock were formed which types of organisms?

Only one answer is correct among these 4 choices:
- only organisms that lived in the sea
- only organisms that lived on land
- only organisms that lived in the air
- organisms that lived on the land, in the sea and in the air

Could you tell me which one is correct?

only organisms that lived in the sea