PLEASE HELP ME WITH THIS I GIVE LOTS OF POINTS

Space is not completely empty. there are small particles in space. what happens when these particles come together?

N1947, the united nations create a country

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.