Fossils.
Early in the 20th century, Alfred Wegener, primarily, established the continental drift theory. According to Wegener, continents are mobile on the surface of the Earth and were previously connected to form a single supercontinent. Scientists did not think that the continents could migrate when Wegener was alive.
In rocks that are the same age but on continents that are currently far apart, ancient fossils of the same species of extinct plants and animals can be found. Wegener claimed that the species had coexisted, but that once they died and become petrified, the lands had separated. According to his theory, the creatures couldn't have crossed the seas.
1. Glossopteris seed fern fossils were too heavy for the wind to carry them that far.
2. Mesosaurus was a reptile that could swim, although it could only do it in freshwater.
3. The terrestrial reptiles Cynognathus and Lystrosaurus were incapable of swimming.
Learn more about continental drift theory here:
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Answer:
trade between countries were u pay who makes the product
Trade arises as a result of the uneven distribution of resources and e<span>ffects of uneven distribution can cause inequality and a low standard of living for those such as the elderly and single mothers. I hope the answer will help you. Thank you for posting your question here at brainly. </span>
Answer:
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GROUNDWATER is the largest source of freshwater on earth.
