Which of the following describes the process of deflation? a. oxygen levels in the air are decreased due to pollution. b. hurricanes destroy natural wind barriers. c. the surfaces of mountains are stripped of trees. d. the wind removes surface particles, resulting in lower land surface.

The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .