Please answer the following question: Fact 1: Mollusks are invertebrates such as the common snail. Fact 2: Snails are protected by a hard shell on their backs. Given the two facts above, answer the question "What are some invertebrates protected by on their backs?" with the following options: - fur - parasites - barnacles - shells - coats - bones - bushes - Epidermis
Answer:
shells