Answer:
Agriculture, revolts, and trade.
Explanation:
Aksum's agriculture began to collapse because of the cutting down of trees and irregular rainfall which eroded the soil. Revolts were also taking place, especially from the North.
Because it <span>divided the South into five military districts and outlined how the new governments would be designed.</span>
The Constitution dictates that the presiding officer of the Senate is the Speaker of the House-<span>President pro tempore
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<span>All plants and animals have gradually evolved over time through a process called natural selection. </span>
He favors the principle of checks and balances. The legislative, executive and judicial branches should support each other, but none should be able to overpower any of the others.