The usa increases its wealth.

human
economic

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

In a scientific experiment, a is any factor that can be changed or be changed

Lomexico, central america, and the caribbean: mastery testselect the correct answer. which of the following was the leading cause of death among native americans after the arrival of europeans? a. conquistadorsb. diseasec. starvationd. warreset