- An ocean is a kind of body of water
- A body of water is a kind of environment
- Hence, an ocean is a kind of environment

- An ocean is a kind of environment
- A tropical environment usually has warm temperatures
- Therefore, a tropical ocean usually has warm temperatures

- A tropical ocean usually has warm temperatures
- Coral lives in tropical oceans
- Hence, coral lives in warm oceans

- Coral lives in warm oceans
- Coral is a kind of aquatic animal
- Therefore, corals are aquatic animals that live in warm oceans

- Corals are aquatic animals that live in warm oceans
- An ocean is a kind of body of water
- If fossils of an aquatic animal or plant are found in a place then that place used to be covered by water in the past
- So, if fossils of corals are found in a place then that place used to be covered by warm oceans in the past

- If fossils of corals are found in a place then that place used to be covered by warm oceans in the past
- Fossils of corals are found in ohio
- Therefore, ohio used to be covered in warm oceans in the past

Hence, ohio used to be covered in warm oceans in the past
Corals are animals that live in tropical oceans. Fossils of corals are found in Ohio. What does the presence of coral fossils suggest about how the environment of Ohio has changed over time?
- A tropical environment usually has warm temperatures 
- An ocean is a kind of body of water 
- If fossils of an aquatic animal or plant are found in a place then that place used to be covered by water in the past 
- A body of water is a kind of environment 
- Coral lives in tropical oceans 
- Coral is a kind of aquatic animal 
- Fossils of corals are found in ohio