What is the MAIN reason why the author included the information about desertification?

Select the correct answer from each drop down menu. among these figures figure and blank have the same volume. 1 a c e 2 b d

Which statement best explains the difference between weather and climate

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted