(2) There is a tough exoskeleton on the surface of the locust body, which can protect the soft organs inside and prevent the water in the body from evaporating.
(3) The grasshopper has three pairs of feet in the chest, namely, the front foot, the middle foot and the back foot, which are segmented and suitable for jumping. In addition, grasshoppers have two pairs of wings, the front wing is leathery, long and narrow, which has a protective effect, and the rear wing is soft and wide, which is suitable for flying.
Therefore, the answer is: (1) head; abdomen
(2) Exoskeleton (3) Three hind legs