What are the adaptations for flight in birds? (i) Hollow bones to reduce body mass. (ii) Feathers covering their body. (iii) A streamlined body with powerful tail. (iv) Wings with powerful muscles.

What are the adaptations for flight in birds? (i) Hollow bones to redu

1.	What are the adaptations for flight in birds? (i) Hollow bones to reduce body mass. (ii) Feathers covering their body. (iii) A streamlined body with powerful tail. (iv) Wings with powerful muscles.
A.	(i) only
B.	(i), (ii) and (iii) only
C.	(i), (ii) and (iv) only
D.	(i), (ii), (iii) and (iv)
Answer» D. (i), (ii), (iii) and (iv)