Which of the following statements best describes environmental changes caused by westward railroad expansion? A) Western forests were cut down for lumber for railroad and bridge construction.
B) Western factories were built in what had been wooded rural areas.
C) Changes occurred only in the Western plains, where animal populations decreased.
D) The railroad expansion caused no environmental changes in the West.

in the 1800s, locomotives powered by steam made transportation faster and cheaper. the resulting rapid growth of railroads led to the connection of the atlantic and pacific railroad in oklahoma city in 1897.

in the last years of the century, the improvement of steam-based engines the expansion and growth of railroads. this growth increased when the companies started to build and expand, such as the atlantic and pacific railroad, which connected new mexico with california, and missouri with oklahoma. many of these new networks were built in oklahoma, and these changes transportation henceforward.

the federal constitution of the united mexican states of 1824 was enacted on october 4 of 1824, after the overthrow of the mexican empire of agustin de iturbide. in the new constitution, the republic took the name of of united mexican states. it was replaced by the federal constitution of the united mexican states in 1857.

darwinism is survival of the fittest there for social darwinism is the survival of the wealthiest