Review the map above. Why is the black line significant in American history? It represents the northern boundary line for territory claimed by Mexico.
It represents the main route for settlers moving into the Oregon Territory.
It represents the northern boundary line for the territory claimed by the United States.
It represents the path of the Transcontinental Railroad, a major trade route in the United States.

B. It represents the main route for settlers moving into the Oregon Territory.

Explanation:

i believe that B is your best answer, as it looks like it is showing the Oregon trail, which led from Independence to Oregon.

hope this helps

It represents the maine route for settlers moving into the Oregon Territory, this map is part of the Westward Expansion(Manifest Destiny) topic!

Explanation:

these conditions long with a short growing season made farming difficult.

explanation:

the north has a climate of warm summers and snowy cold winters. the terrain is rocky, hilly, and not good for farming.

christopher columbus (1492–1504)