Guo Dun, a poet of the Ming Dynasty, described the scene when the locust plague occurred in "Locusts": "The locusts cover the sky and the sun is colorless, and the wild fields shed tears and blood." P

Guo Dun, a poet of the Ming Dynasty, described the scene when the locust plague occurred in "Locusts": "The locusts cover the sky and the sun is colorless, and the wild fields shed tears and blood." Please answer the following questions.

(1) From the first sentence of the poem, "Locusts cover the sky and the sun is colorless," we can know that locusts have the habit of swarming.

(2) Adult locusts mainly feed on gramineous crops, with a large food intake and strong digestion capabilities. The reason why farmers are so sad is because locusts mainly harm gramineous plants, and locust plagues will cause crop failure.

(3) The reason why locust plagues cause damage to crops is mainly related to the mouthparts and feeding habits of locusts. Locusts have chewing mouthparts and are suitable for feeding on leaves and stems of crops. Based on this characteristic, the measure we can take to control locusts is to spray pesticides on crops.

(4) Locust plagues generally occur in drought years, mainly because locusts have exoskeletons on their bodies, which can prevent the evaporation of water in their bodies. This shows that locusts can adapt to drought environments.

(5) Locusts have 2 pairs of wings and 3 pairs of legs. The hind legs are well developed and suitable for jumping, and the hind wings are wide and suitable for flying. Therefore, locust plague occurs in a large area and a wide range.

So the answer is: (1) Cluster.

(2) Gramineae. ?

(3) Spray pesticides on crops. ?

(4) Exoskeleton; evaporation of water in the body. ?

(5) Have developed locomotive organs, feet and wings.