Fact 1: Being exposed to wind can cause erosion of soil. Fact 2: Wind erosion is slowed by wind barriers such as trees and shrubs. Given the two facts above, what blocks erosion?
OPTIONS: (a). roots; (b). Raft; (c). bamboo; (d). trees; (e). bushes; (f). Roads; (g). rivers; (h). streams;
Answer:
(d).