The peculiarity of American institutions is, the fact that they have been compelled to adapt themselves to the changes of an expanding people—to the changes involved in crossing a continent, in winning a wilderness, and in developing at each area of this progress out of the primitive economic and political conditions of the frontier into the complexity of city life. Which action was an example of the process described in this excerpt?

begins a massive airlift of food, water, and medicine to the citizens of the besieged city

eroupe is a great mideval place and alot of wars went on alao

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.