All of the following are examples of physical boundaries except:
a. an ocean
b. a mountain range
c. a barbed wire fence
d. a rive

Which of the following insects is a decomposer? a. mosquito. b. caterpillar. c. beetle. d. none of the above.

Which of the following statements is most likely a characteristic of an authoritarian government in africa

Which of the following statements does not describe shi huangdi? a. shi huangdi was the first emperor of the qin dynasty. b. shihuangdi wrote the lunyu, the most important text in confucianism. c. shihuangdi conquered city-states to unite china. d. shihuangdi began the process of building the great wall of china.