Answer:
The difference between monarch and president is that monarch is a ruler of an absolute monarchy or the head of state of a constitutional monarchy while president is the head of state of a republic, a representative democracy and sometimes a dictatorship.
Explanation:
"Adams himself showed a fondness for monarchy, and in his own writings classified America as a "Monarchial Republic", by which he meant that the executive power was in the hands of an individual, and was a republic in so far as the constitution provided for the representation of the people."
The North China plain is a flatness which has been formed by the time with the sediments of the Yellow river.
As it was not uploaded an image to indicate where this plain is, a picture from google was chosen for this purpose giving some directions on a map of China.
Because they have a great economy and it is one of the richest countries of the world.