Question

3. Without exception, which one of the following is
true for all birds?
(a) Omnivorous
(b) Have feathers and fly
(c) Have calcareous shelled egg
(d) Form nest and care them​

Answer 1

Birds belong to the class Aves and phylum Chordata. All the birds have feathers, the lightweight skeleton with hollow bones, beaks and wings. Although there are certain birds which cannot fly but they have wings. All the birds are known to lay eggs. The egg of the bird has an outer hard shell which is made of calcium and hardened mucus. The eggs may be either colourful or have spots on them. ....

Answer 2

C is the right answer

because because the birds arebelong to the class Aves and phylum chordata