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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Dhanusha marimuthu nadar
Correct option:D. Explanation:- The option A , B and C are the characteristics of Phylum Porifera. Hence the correct option is D because the phylum Porifera(Sponges like organism) are sessile organisms not a motile and they do attain sedentary habitat as it remain attached to the underwater substratum.