__________, a group of animals that were attached to the seafloor and captured food with their waving arms as it came floating by, expanded to their greatest diversity during Early Carboniferous.

Question

Quizplus · Accepted Answer

The statement specifically mentions animals attached to the seafloor and capturing food with their arms, which is a characteristic of crinoids. Additionally, it is known that crinoids reached their highest diversity during the Early Carboniferous period. The other options discussed in the question (brachiopods, bryozoans, and fusulinids) do not fit the description given.

__________, a Group of Animals That Were Attached to the Seafloor