Select all that apply. What factors contributed to the westward expansion of the U. S.?

the Cold War
the Revolutionary War
the discovery of gold
decreased immigration
increased immigration
the Homestead Act
the desire for land, wealth, and adventure

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.