What types of fossils would provide the best evidence that the Earth’s continents used to be connected? Birds, fish or land animals? Explain why.

Land animals.

Explanation:

Birds and fish could move between continents that were not connected. If fossils of the same land species are found on what is now different continents, that implies that the land masses were once connected and that animal was able to travel between them.

answer; polycythemia is the correct answer;