Can someone check my answers?

1. the 1930s dust bowl in the great plains was caused by (1 point)
a. deforestation.
b. contour plowing.
c. using renewable resources.
d. poor farming practices.

2. when farming, overgrazing, climate change, and/or seasonal drought change farmland into land that cannot support plant life, it is called (1 point)
a. desertification.
b. depletion.
c. deforestation.
d. monoculture.