The photo contains a pill bug, better known as a roly poly, that has a segmented body. The roly poly has a segmented body because its body is divided into three parts. These parts are the head, the thorax, and the abdomen. The definition of a segmented body is a body divided into segments that are grouped into larger functional units. This is a characteristic that all arthropods have and a roly poly is indeed an arthropod since it is in the scientific Phylum classification of Arthropoda.
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