Available options: I. rectangle. II. Loose. III. swimming. IV. barrel. V. protected. VI. swea. VII. square. VIII. cross.
Given those answer options, answer the question: Fact 1: Adult tunicates are barrel-shaped. Fact 2: Tunicates, or sea squirts, are marine organisms covered with a gelatinous tunic. Given the two facts above, what shape are sea squirts?
A:
IV.