How does this map help explain the growing divide over slavery in the United States?

What is walt whitman's poem "when i heard the learn'd astronomer about?

Atreaty was signed in 1842 to end the border dispute between the u.s. and britain in maine. which best expresses the end result for britain? *pic* the british lost all the territory in maine the british territory was bigger than that of the u.s. the british territory was smaller than that of the u.s. the british territory was the same size as the u.s. territory

What evidence is there in this document that the policy was a good idea?