U-a representative democracy. It is a government by the people, because the president and members of Congress are elected.
M- is a federal republic. It is a federation of states.
C - runs a government that is a democracy with a prime minister. Also known as parliamentary democracy.
G - is an independent nation ran by a prime minister.
The first answer is answer. not a process, so it can't be the correct answer.
The second answer refers to the process of liquids changing their state to gas- so it's also not the correct answer.
The correct answer is the last one: desertification!- this is the process when a place becomes a dry and plantles ground.