Iron - rich minerals in rock pointed in one direction and then switched to the exact opposite direction. this supports what idea? a. the rocks were being turned around. b. earth's magnetic field stopped working entirely. c. earth's magnetic field goes through pole reversals. d. being underwater makes the rocks respond to magnetic fields.

answer; i believe the correct answer is (clockwise and outward) about the center;

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.

(4,-2)

explanation:

6x+4y=16

-6x-9y=-6

-5y=10

y=-2

x=4

show options, then i will gladly answer you question.

have a good day.