the migration patterns of birds the periodic climate changes of Earth the large variety of animals on each continent the similarity of fossils on different continents
I gave my students this multiple choice question: The theory of continental drift states that the land masses called continents were once closer together and have drifted apart over time. Which circumstance is the strongest evidence in support of this theory?

Only one answer is correct among these 4 choices:
- the migration patterns of birds
- the periodic climate changes of Earth
- the large variety of animals on each continent
- the similarity of fossils on different continents

Could you tell me which one is correct?

the similarity of fossils on different continents