Question

defining feature of echinoderms. the name reflects the presence of spines or bumps on the outer surface of many echinoderms, such as sea urchins and sea stars. these spines are often used for protection, locomotion, and sensory purposes. where does the term \echinoderm\ come from? it refers to the characteristic of spiny or prickly skin. it describes the creatures feeding mechanism. it refers to the creatures aquatic habitat.

Explanation:

The text states that the name "echinoderm" reflects the presence of spines or bumps on the outer - surface of many echinoderms like sea urchins and sea stars.

Answer:

It refers to the characteristic of spiny or prickly skin.