The correct answer is: Environmental problems
I hope this helped you!
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To your first question--James Madison is widely known as the architect of the US Constitution (Although in reality it was the result of team work by 56 delegates).
To your second question--The six key principles outlined in the US Constitution are:
1. Popular Sovereignty (i.e. democracy or rule by the people)
2. Limited Government (i.e. again, democracy or the government can only do what the people instructs it to do)
3. Separation of Powers (there are three branches of power: legislative, executive, and judicial AND they are separate from each other)
Which brings me to...
4. Checks and Balances (each branch "checks and balances" the other two branches' power. For ex: the US President can veto congressional bills, Congress can ratifies judicial nominees, and the Supreme Court decides on the constitutionality of congressional bills).
5. Judicial Reviews (the judicial branch reviews governmental actions)
6. Federalism (there is a federal and a state government. These are separate from each other)
Begun in the 3rd century AD, the crisis of the Roman Empire was mainly caused by the fragmentation of its western part with the arrival and installation of the Germanic peoples.
From the third century AD, the Roman Empire began its phase of decline and decay, which eventually resulted in the fragmentation of its western part. The economic and political crises added the arrival of the Germans, leading to the end of the western part of the empire and the occupation of its territory by these peoples.
Roman art was produced by the people belonging to Ancient Rome and lasted from about the 8th century BC to the 4th century AD.
It was strongly influenced by the Etruscans and Greeks, and the most significant artistic manifestations date back to the establishment of the Republic in 509 BC.
D because soldiers want to have a good impression in front of their drill sargents
