The global occurrence of earthquakes reveals that a. they prove that Earth is splitting apart (rifting) at all plate boundaries. b. they usually occur at the center of plates. c. they usually occur on the boundaries of plates or at hot spots. d. their locations are randomly scattered.

Which of the following statements best describes what is occurring in the land surrounding the sahara desert? a desertification is increasing, and the desert is expanding. b. fewer people are trying to farm in this semiarid region. c. the desert is shrinking with the increased use of irrigation. d. increased urbanization has resulted in decreased deforestation. select the best answer from the choices provided mark this and return save and exit next submit