The theme represented in this painting is most associated with -

d.

the northwest territory became the most densely populated area in the u.s.

where is thing if you show me on the map or have a map i can answer your question

answer is b.

  it is always the best policy to have good communication and good relations between individuals and, specially, between leaders of the countries. for this purpose, among others, there is a common place, the united nations, where the representants can present his and learn about the other country's policies.