Question

how did westward expansion affect the national climate in nineteenth - century america?
it limited access to natural resources.
it brought the issue of slavery to the forefront of politics.
it gave homes to the many displaced indigenous peoples.

Explanation:

Westward expansion in 19th - century America led to the acquisition of new territories. One of the key political issues was whether these new territories would be slave - holding or free. This brought the slavery issue to the forefront of political debates. Access to natural resources was increased (not limited) with westward expansion. Also, Indigenous peoples were displaced further (not given homes) as settlers moved west.

Answer:

It brought the issue of slavery to the forefront of politics.