Question

the hermit crabs use the shells of dead snails for homes. what type of symbiosis is this an example of? a mutualism b parasitism c commensalism

Explanation:

• Mutualism: Both species benefit. Here, only hermit - crabs benefit.
• Parasitism: One benefits at the expense of the other. Snails are dead, so no harm to a living snail.
• Commensalism: One benefits, the other is neither helped nor harmed. Hermit - crabs use dead snail shells (no impact on living snails).

Answer:

c. Commensalism