I WILL GIVE BRAINIEST

What are the 21st Century challenges facing the U. S. from a foreign policy and military aspect? (List 3 examples and briefly explain each of them).

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.

Name three things the framers of the constitution did to keep the federal government or any part of it from becoming too powerful.

I'm in a few lessons on eastern europe and i need me don't leave me hanging. : {