Continents closer to the equator have warmer climates, yet fossils of [___] have been found on islands near the North Pole. This supports the idea that islands drifted from the equator.

Fossils of tropical plants on islands near the North Pole suggest those islands once had a much warmer climate. This supports the idea that the islands drifted from near the equator toward the pole, so the correct choice is tropical plants.

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