Most molluscs are:

Terrestrial

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Fresh water

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Marine

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Segmented

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Solution

The correct option is C Marine
Mollusca is the second-largest animal phylum. Molluscs can be terrestrial or aquatic (marine or freshwater) having an organ-system level of organisation. But most molluscs are marine.
They have a soft body and calcareous exoskeleton. Example, Chiton, Octopus, etc.

Thus, the correct answer is option C.

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