Alfred Wegener proposed that the continents were once united into a single supercontinent named Pangaea, then the continents then moved to their current positions. He called his hypothesis continental drift.
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What evidence was given by researchers to proof that continents were joined together?</h3>
Wegener and his supporters collected a great deal of evidence for the continental drift hypothesis which came in the 1950s from studies on the Earth’s magnetic history.
He found that identical rocks which are found on both sides of the Atlantic Ocean had formed side-by-side and land had since moved apart. Ancient fossils of the same species of plant and animals are found in rocks of the same age but are on continents they are separated.
Scientists used magnetometers, and noted that magnetic polarity of different aged rocks are from the same continent.
Learn more about the Continents history here:-
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Answer: Overpopulation
Explanation:
Overpopulation is a phenomena in which population of a concerned region raises explicitly in large numbers. The two main reasons for overpopulation in India are higher birth rate and lower death rate. India is facing many consequences due to overpopulation like unemployment, poverty, food insecurity, extinction of plant and animal species, loss of ecosystems, deforestation, water and air pollution and others.
Assuming that you're referring to the villages in the Sahel during the era of Sahelian Kingdoms, a lot of them settled on the edge of Sahara, on its southern border to be precise. The southern border of Sahara is filled with forests and have enough resource to sustain their living. But they cant go any further because they were hindred by the Ashanthis and Yoruba
