1. Fossils of the ancient reptile mesosaurus were discovered in South America and Western Africa
2. Climate is the same in South America and Western Africa
3. Geology is the same, particularly having the same types of rocks in South America and Western Africa
The answer is all of the above.
Answer: 6.313 miles
Explanation:
The distance is calculated by Simple Rule of Three:

Which continent would have the majority of the superimposed boundaries in the world?
The answer is “Africa.”
Unitary: no local decisions.
Federal: some local decision.
Confederation: a lot of local decisions.