By forming trade blocs United States and other nations primarily cooperate economically
#1) What first lady banned dancing and card playing in the white house?
Answer: Sarah Childress Polk was married to the 11th President of the United States, James Polk. She served as First Lady from 1845 to 1849. A devout Presbyterian, as First Lady she banned dancing, card games, and hard liquor at the White House. When she attended the Inaugural Ball, she did not dance. She was known as a strict "Sabbatarian, kept her husband from conducting any official business on Sundays. She hosted the first annual Thanksgiving dinner at the White House.
The answer is Erosion, which is the the gradual destruction or diminution of something -- in this case, rocks. I hope this helps! For reference/perspective, sand is the product of rock erosion, because it's really just tiny remnants of crushed rock. Those "small pebbles" could be sand, but you'd have to emphasize just how small they are -- one grain of sand is just that: a grain
He wanted more land for America