Why do some mollusks have shells?
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Explanation:
Mollusk shells come in many shapes and sizes, but most have the same, simple function providing somewhere to hide in times of danger. In land mollusks, the shell also helps to prevent the moist, soft-bodied creature from drying out.
Answer:
Mollusks often have a hard outer shell to protect their bodies. All mollusks have a thin layer of tissue called a mantle which covers their internal organs. The mantle produces the mollusk's shell.
Explanation: