Please help me! The concept seen the pictures above is

a. desertification

b. terrace farming

c. deforestation

d. migration

where is thing if you show me on the map or have a map i can answer your question

roosevelt, a progressive reformer, earned a reputation as a "trust buster" through his regulatory reforms and anti-trust prosecutions. his "square deal" included regulation of railroad rates and pure foods and drugs; he saw it as a fair deal for both the average citizen and the businessmen.