The picture shows the external morphological structure of several animals. Please answer Xie Lie's question: (1) Animal A belongs to _ _ _ _ _ _ _ _ _ _ _

(1) The earthworm's body is composed of many similar segments, and it has a body cavity. It belongs to annelids.

(2) Snail B is a mollusk with a soft body, shell and sleeve. Its moving organ is gastropod.

(3)C Lobster and fly have exoskeletons and appendages, which belong to arthropods. Among them, e fly has three pairs of feet, head, chest and abdomen, belonging to Insecta.

(4)D worm is a flat animal with symmetrical sides, flat back and abdomen and no anus in its mouth. In the picture, ① is the back, ② is the abdomen, ③ is the eye point and ④ is the pharynx. ③ Eye points can feel external stimuli.

So the answer is: (1) link; Body parts;

(2) software; Shells; Abdominal foot;

(3) clarity; Segmenting; e； Head; Chest; Abdomen;

(4) flat; Both parties; eyespot