Question

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.

Answer 1

the correct answer is a

Answer 2

"a. Western forests were cut down for lumber for railroad and bridge construction" would be the best option, since not only was more space needed, but materials were needed as well.