Final answer:
Brittle Stars are echinoderms that have easily broken arms to escape predators.
Step-by-step explanation:
Brittle Stars are the type of echinoderms that have flexible arms that are easily broken to escape predators. They belong to the class Ophiuroidea and are known for their slender, branched arms. If a brittle star is caught by a predator, it can voluntarily shed one or more arms, which continue to move and distract the predator while the brittle star escapes. This ability to break off and regenerate their arms is a remarkable defense mechanism.
Learn more about Brittle Stars and their defense mechanism