The answer is critical thinking !!
<span>Sexual reproduction INCREASES variation and selective breeding DECREASES variation.
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Where are the answers so i can help :)
A Glacier is a sheet of ice that moves slowly over land.
Mongolia before the rise of Genghis Khan - d.
Mongols were always characterized by scattered groups of warriors from warring tribes and tribes who were allies. Before Genghis Khan came along, none of them were able to unite together and become a mighty enough force that would be able to challenge the Chinese Empire in the South.
