Jointed appendages are characteristic of the phylum

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Echinodermata

Annelida

Mollusca

Arthropoda

answer is D.

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Detailed Solution

Concept: In creatures of phylum Arthropoda concerted accessories are set up and these are modified for colourful functions. This is the character of this phylum. Phylum Arthropoda is the largest phylum of the Animalia area. The exoskeleton of these creatures is made up of chitin. These are the most advanced non-chordates. Class Insecta is the largest class of this phylum. Insects have three dyads of accessories as a characteristic point. In creatures of phylum Annelida, side accessories are set up that are called parapodia. These help for movement in the water. For illustration, in Nereis parapodia are set up. In creatures of phylum Mollusca's body is covered by a mantle that's made of calcium carbonate. For movement, a muscular bottom is set up. In Echinodermata, tube bases are set up which are related to its water vascular system and help in locomotion.
Hence, option 4 is the correct answer

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