You come across several invertebrate organisms crawling through the sand.You notice that they have a soft body wall, and when you dissect one, you see that it has no rigid structures inside the body.This organism most likely

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The absence of rigid structures inside the body and a soft body wall suggest that the organism uses a hydrostatic skeleton to move. Hydrostatic skeletons rely on fluid pressure to provide support and enable movement. In contrast, options A, B, and E involve some type of rigid structure, which is inconsistent with the observations of the organism. Option C describes an exoskeleton, which is a rigid external structure rather than an internal one.

You Come Across Several Invertebrate Organisms Crawling Through the Sand