Which of the following is not a savanna?
a. cerrado
b. pampas
c. llanos
d. serengeti

All of the following are reasons why deserts extremely susceptible to wind erosion except a. they lack major root systems b. they contain thin, dry soil c. they have very few plants and trees d. they are extremely hot and lack water

Countries in this region are trying to achieve development. a. attainable c. sustainable b. suspendable d. intangible

After railroads, the next revolution of transportation came with the development of (a) automobile (b) telegraph (c) steam engine