Context: Opalescent nudibranchs have stinging cells in their brightly colored skin. The bright colors serve as a warning sign that the animal is toxic and dangerous. The 's skin is adapted to ward off predators.
Figure: opalescent nudibranch.
Which animal's skin is better adapted as a warning sign to ward off predators?
A. peppered moth
B. crown-of-thorns sea star
Choose the right answer from the options and respond with its letter.

B