how do the third one respire?
Via skin and gills.
Annelid
In some annelids, including earthworms, all respiration is via the skin. However, many polychaetes and some clitellates (the group to which earthworms belong) have gills associated with most segments, often as extensions of the parapodia in polychaetes.
what is ocean sunfish? One of the heaviest known bony fishes in the world. what do they survive on? Small fish, fish larvae, squid, and crustaceans, etc. what is the last one? Large and diverse arthropod taxon. can the term that you just mentioned be classified? Yes, subdivided into five subphyla. can you name any? UNANSWERABLE where do these creatures get their name from? Greek "árthron" and "pous" could you please describe them? Invertebrates with segmented bodies and jointed limbs. can you state a feature of the term that you just mentioned? Absence of a vertebral column (backbone) how do they reproduce? They reproduce at least partly through sexual reproduction. could you please give a few examples of this group? Arthropods, mollusks, annelid, and cnidarians.
wiki:19305421
Annelid [SEP] Respiration
In some annelids, including earthworms, all respiration is via the skin. However, many polychaetes and some clitellates (the group to which earthworms belong) have gills associated with most segments, often as extensions of the parapodia in polychaetes. The gills of tube-dwellers and burrowers usually cluster around whichever end has the stronger water flow.