Which of the following actions has caused desertification in Africa? i. Overgrazing of livestock ii. Farming the same land over and over iii. Practicing deforestation A. i. only B. ii. only C. i. and ii. only D. i., ii., and iii. Please select the best answer from the choices provided A B C D

The smokey mountains have over 2,100 miles of rushing mountain streams and rivers that flow through the park. in each mile lives a diverse community of native fish, amphibians, insects, and larvae, some of which are found only in the southern appalachians. park managers and scientific researchers test many factors such as fish populations, the watersheds and water tests to determine a) too many lizards are present b) the water quality of the stream c) rainwater is running into local streams d) if visitors to the park are overstaying their welcome