How would humans react if aliens came to earth?

What border separates sonora and chihuahua national border state border physical boundary natural boundary

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

Under which condition below would u expect a coarse-grained intrusive rock like diorite to form?