Five Mass Extinctions took place, which lowered the variety of species found on Earth today. The five mass extinctions were: End Cretaceous, End Triassic, End Permian, End Ordovician, End Devonian. Scientists this we are now living through the 6th mass extinction.
Hope this helps! :)
Answer:
As emperor of Ethiopia (1930–74), Haile Selassie I was known for modernizing his country, for helping to establish the Organization of African Unity (now the African Union) in 1963, for his exile (1936–41), and for being overthrown in 1974. He was also regarded as the messiah of the African race by many Rastas.
Explanation:
Trade was a primary factor in the rise and development of the West African kingdoms of Ghana, Mali, and Songhai. In particular, these kingdoms grew wealthy, powerful, and influential because they were able to collect taxes from traders who crossed their territories. … After some time, trade made it stronger