The western empire had lost most of its political, religious, and economic power
Because they managed to lost the power to use their original language and replaced by another
hope this helps
<span>Henry Clay, U.S. senator from Kentucky, was determined to find a solution. In 1820 he had resolved a fiery debate over the spread of slavery with his Missouri Compromise. Now, thirty years later, the matter surfaced again within the walls of the Capitol. But this time the stakes were higher -- nothing less than keeping the Union together.</span>
In my view, environmental changes often lead to global migration, because people need particular conditions to live. So the most suitable option is: <span>A. Environmental changes forced people to migrate to other areas. The number of environment migrants still grows and by 2050, in about 200 million people will leave their homes because of environmental changes.</span>
The answer to your question is Marbury v. Madison
