the simplest answer would be it makes a ecosystem more stable. you also have more variety witch helps incase a promblem occurs
The word that would fit the blank is vascular. You are consuming the vascular tissues of a plant when consuming a celery stick. This part of the celery is called the petiole. This is the stalk that joins a leaf and a stem. This part is made up largely of vascular tissues.
C. Cnidarians and echinoderms is the answer.
There are 3 phyla that sorts worms platyhelminthes (flatworms), nematodes (round worms) and annelids (segmented worms). The closest one is C.
hope I Helped!
