I'm not sure about 2 and 3, but the Aztecs built Tenochtitlan because they saw an eagle holding a snake on a pr(i)ckly pear cactus and thought it was a sign from the gods. They based the flag off of that.
I added the "i" in parentheses because Brainly found it a bad word?
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Why are you making us basically do a half-essay for you?
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I'm not 100% sure but I think it's email