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Questions 1-5 are based on the following text.
 

The Symbiosis between Hermit Crabs and Sea Anemones
 

    Hermit crabs live in symbiosis with sea anemones. Different from other crabs, hermit crabs do not have shells and their bodies are soft. They look for empty mollusks and live inside them, with legs and heads sticking out.

    Usually a sea anemone sticks on top of the mollusk. The anemone protects the hermit crab from attackers with its stinging tentacles. In return, the anemone eats shredded food particles spilled by the crab. When the mollusk becomes too tight for the hermit crab, it, together with the anemone, looks for a bigger empty mollusk.

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