Whales, though they resemble fish, are warm-blooded and need thick layers of fat, or blubber, to protect them from frigid waters.
(they; resemble; fish) (Whales; are; warm-blooded) (Whales; need; thick layers of fat, or blubber; to protect them from frigid waters)
they Whales Whales
resemble are need
fish
warm-blooded
thick layers of fat, or blubber to protect them from frigid waters