Peripatus is an organism that exhibits characteristics of both Annelida and Arthropoda, making it a connecting link between these two groups.
Annelid-like features:
Segmented body.
Thin, non-chitinous cuticle.
Arthropod-like features:
Possesses jointed legs.
Tracheal system for respiration.
Other options are incorrect because Peripatus does not show features of the groups listed in them. Thus, Peripatus is a connecting link between Annelida and Arthropoda.