Question

all the animals within the phylum chordata...
possess a spinal cord.
possess all these traits.
are warm - blooded.
have lungs.

Explanation:

Animals in the phylum Chordata have a notochord (which in vertebrates develops into the spinal cord), a dorsal nerve cord, pharyngeal slits, and a post - anal tail at some stage of their development. Not all chordates are warm - blooded (e.g., fish are cold - blooded chordates) and not all have lungs (e.g., fish have gills). But all chordates possess the fundamental chordate traits.

Answer:

possess all these traits.