For each characteristic of mineral extraction, decide whether it applies to strip mining, subsurface mining, or both types of mining. Generates acid drainage
Overburden is removed from mining site
Used to extract coal
Used to extract resources that are
Near the surface
One of the most dangerous
Occupations in the United States
Safety requires good ventilation systems
Used to extract resources that are deep underground
Destroys large areas of wildlife habitat

lol

Explanation:

sorry butt i don't know this one

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.