For #1, all we know is that the classic cities in the southern lowlands were abandoned, but we don't know why.
Hey Thts hard but to find out just go look on google copy and paste you will find a great answer
The major downfall of the Articles of Confederation was simply weakness. The federal government, under the Articles, was too weak to enforce their laws and therefore had no power. The Continental Congress had borrowed money to fight the Revolutionary War and could not repay their debts.
Answer:
It is a river system in Asia
The Muslim presence in north Africa in seventh and eight centuries was most visible through the merchants, and specifically in the cities and ports where the merchants went: Islam spread along the trade routes.
