Let's solve the crossword puzzle first:
Across:
Big animal that has one horn: Rhinoceros
This animal has a very long neck: Giraffe
Man's best friend: Dog
Lives in the cold and waddles: Penguin
Slow-moving and has a shell: Turtle
Striped animal that looks like a horse: Zebra
Can swim underwater, walk on land, and has a big bite: Crocodile
Down:
This animal has a long trunk: Elephant
This animal likes to eat carrots: Rabbit
This animal loves bananas: Monkey
Some say this animal has nine lives: Cat
Has big ears and likes to hop: Kangaroo
King of the jungle: Lion
Now, let's classify the animals based on the type of ears they have:
External Ears:
Elephant
Cat
Mouse
Camel
Pig
Buffalo
Internal Ears:
Sparrow
Pigeon
Peacock
Duck
Lizard
Frog
Hen
Animals can have either external or internal ears. External ears are visible parts called pinnae, whereas internal ears are covered within the body, with sound being transferred directly through air or water to the ear canal.