Which of the following best belongs in the blank for Y?


are fish
sometimes swim in groups
swim in groups to hunt
have many sharp teeth
use gills to breathe
Y
eat smaller fish and seals
are often feared by humans
are endangered


A...
tend to eat creatures that are easy to catch
B...
swallow their food whole and do not chew
C...
must be in the water to breathe through gills
D...
breathe through gills just like bony fish