A) arborial insects
B) marine animals
C) terrestrial insects
D) fresh water forms
Correct Answer: B
Solution :
Echinoderms are marine, spiny skinned animals. All members of phylum Echinodennaia are marine. These have water vascular system which helps in locomotion, e.g.. Starfish, antedon. Arborial insect are insects, which living on trees. Freshwater forms are animals or plants living in freshwater of ponds, e.g., Hydrilla. Terrestrial insects are insects which lived on ground/land e.g.. Termites, ants.
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