A. 
B. 
C. 
D. 
Answer: A
Solution:
The butterfly is the different one in this list. While the sparrow, parrot, and ostrich are all birds (belonging to the class Aves), a butterfly is an insect (belonging to the class Insecta).
A.
B.
C.
D.
Answer: A
Solution:
The butterfly is the different one in this list. While the sparrow, parrot, and ostrich are all birds (belonging to the class Aves), a butterfly is an insect (belonging to the class Insecta).