How did the first streetcars move?

What was the 1787 constitutional convention? !

Why were americans concerned about the future of north and south america? check all of the boxes that apply. they worried that european countries would take over independent countries in latin america. they thought that european nations could threaten democracy in the united states. they believed that europe would never again return to the americas.

Which best summarizes the social contract outlined in the preamble of the declaration of independence?