Question

a few line of birds​

Answer 1

Answer:

1) Birds fly with their wings which are modified forelimbs.

2) The bones of the birds are hollow and very light, making it easy for rise in air.

3) Strong musckes in their breast bones help birds to flap their wings and fly.

4) Some birds also swim in water.

5) Birds have some common features like they all have feathers, wings and the two legs.

Answer 2

Answer:

Birds are a group of warm-blooded vertebrates constituting the class Aves, characterized by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton