Arthropoda is a phylum of invertebrates that includes insects, spiders, crustaceans, and other related organisms. It is characterized by several unique features, including a chitinous exoskeleton, metameric segmentation, and jointed appendages.

Explanation:

The answer to this question is option 'C' - Parapodia. Parapodia are not present in the phylum Arthropoda. Let's understand the other features of this phylum in detail:

Chitinous exoskeleton:
- Arthropods have a tough, protective outer layer made of chitin, a complex carbohydrate.
- This exoskeleton provides support, protection, and helps prevent water loss.
- It also serves as a site of attachment for muscles and other tissues.

Metameric segmentation:
- Arthropods have a body that is made up of repeating segments, which are called metameres.
- Each segment has a pair of appendages, such as legs or antennae, and they are specialized for different functions.
- This segmentation allows for greater flexibility and adaptation to different environments.

Jointed appendages:
- Arthropods have jointed appendages that are used for movement, feeding, and sensory perception.
- These appendages are unique in the animal kingdom and allow for a wide range of movements and behaviors.
- They are also specialized for different functions, such as walking, swimming, or grasping prey.

Parapodia:
- Parapodia are a feature of another phylum, Annelida, which includes segmented worms.
- They are fleshy, paddle-like structures that are used for locomotion and respiration.
- They are not present in Arthropoda.

In conclusion, Arthropoda is a phylum of invertebrates that is characterized by several unique features, including a chitinous exoskeleton, metameric segmentation, and jointed appendages. Parapodia, on the other hand, are not present in this phylum.

C. Parapodia
is correct answer
Annelida have the Parapodia for locomotion.
Parapodia are absent in Arthropoda.