Use the image below to answer the following question:

public domain

how did this structure benefit china? (4 points)

it was built in the north to protect the empire from foreign invaders.

it allowed the military to access far regions of the empire.

it carried fresh water from the mountains to arid regions.

it crossed the asian continent to provide traders with safe passage.

"but let us admit texas, and we shall place the balance of power in the hands of the texans themselves. they, with the southern states, will control the policy and the destiny of this nation; our tariff will then be held at the will of the texan advocates of free trade. are our friends of the north prepared to deliver over this great national policy to the people of texas? " - rep. joshua giddings, ohio, may 21, 1844 this quote points to what major issue in the years leading up to the civil war?