The answer for sure is A arctic circle
Answer:
Option: a. 200 million years ago
Explanation:
Million years ago, Earth had one supercontinent called Pangaea and surrounded by an ocean (Panthalassa). Alfred Wegener proposed the concept of one big continent after putting together different records of confirmation. He was able to give his theory by examining fossils of plants, trees, animals, and reptiles that found in different continents. About 200 million years ago, the supercontinent began to split up into two parts; Gondwana from Laurasia. Today's countries, including Africa, Antarctica, India, South America, and Australia are part of Gondwana, where Europe and North America from Laurasia.
The Mississippi River divides the eastern United States from the western United States.
North Cascades National Park is very rocky and features mountains and sneak peeks of the North Cascades Range. The mountain peaks have formed due to erosion from water and glacial ice.
<span>The greenhouse effect increases temperatures on Earth. ... of the planet's heat that would otherwiseescape from the atmosphere out to space. ... The difference between the Earth's actual average temperature 14° C (57.2° F) and ... of the sun's energy with greenhouse gases such as carbon dioxide, methane, ... Water vapor.</span><span>
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