They are appointed by the President and approved by the Senate
During the 19th century, America had a strong reluctance to become involved in other countries alliances and affairs. Isolationists in America argued that the US had a different philosophy than European countries and the US should defend freedom and democracy by not being involved in such things.
During the Spanish-American War, the US remained isolated and the country fought the war without alliances and without fighting in Europe. But the mindset started to change since the motto of freedom and democracy was substituted by the US bringing an empire in the Caribbean and in the Pacific - the US had influence in the Phillippines, Puerto Rico and Guam -.
President Roosevelt had the big stick policy, he believed that the US should export its values and become a global power. At the same time, he defended that the US should avoid conflicts. President Roosevelt ended the isolationism in the US and started the modern American philosophy of acting aggressively in foreign affairs even without the support of the Congress.
Its the 3rd one. they made terraces in the mountains to create more farmable land
Answer: The Tang dynasty is famous for its territorial expansion, its great cities and palaces, its flourishing foreign trade, its art, literature, and religious life, and for the luxurious lives of its aristocrats. The dynasty fell when Zhu Wen, a military governor, deposed the last emperor of Tang, Emperor Ai of Tang, and took the throne for himself.
The Song dynasty brought the Age of Invention on china through the implementation of printing, paper money, porcelain, tea, restaurants, gunpowder, and the compass. During this dynasty, china was the most advanced ancient civilization in the world. It eventually collapsed when it was conquered by the mongol barbarians.
