In the united states, a(n) boundary separates us lands from another country.

Federal

Explanation:

A boundary that separates US lands from those of another country is called a federal boundary. This is the type of boundary that exists between the United States and Mexico or Canada. Boundaries of this kind serve several purposes. Boundaries regulate trade and commerce in order to protect the local industries. Moreover, Boundaries regulate the flow of people. Finally, boundaries are meant to provide safety as the frontier is very will examined.

e. all of em

~courtney

the correct answer is "c: merchants" and "e. soldiers".

the song dynasty was known as the first government in the world to introduce paper currency. it was also the first chinese government which established a permanent standing navy. finally, the first compass was introduced during this period of government.

all of these innovations heavily affected commerce in a positive way. printed money dynamize commerce within the borders of the empire due to an easier way to quantify value during the trade. the introduction of the compass trade routes to be faster. finally, the introduction of a standing navy regulate trade routes.

regarding military affairs, gunpowder was created during this period. this was a tremendous improvement that was widely utilized by the military in order to innovate in the manufacturing of weapons.