Which development in the early 1900s made the land in the great plains even more vulnerable to erosion?

railroads stopped building lines across the west.

people settled the region in greater numbers, increasing the amount of land being plowed and grazed.

large numbers of farmers left the region and moved to cities.

farmers reduced the number of acres they plowed each year.

Tori is researching for her blog post about how wearing sunblock can prevent skin cancer, and she finds a page about her topic on the united states centers for disease control website at is this a reliable site for tori’s research? yes, because it is presented by a college or university no, because it is a personal opinion about the subject yes, because it is run by a governmental organization no, because it is intended to advertise a certain product