Limestone is formed primarily through . chemical interactions between ocean bottom sediments and ions in sea water direct precipitation from seawater biochemical sediments secreted by marine organisms evaporation of calcite rich seawater

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