Give scientific reason: Birds are adopted to aerial mode of life.
Kindly refer the link below
https://www.meritnation.com/ask-answer/question/how-are-aves-adapted-for-aerial-mode-of-life/diversity-in-living-organisms/9713583
Regards
https://www.meritnation.com/ask-answer/question/how-are-aves-adapted-for-aerial-mode-of-life/diversity-in-living-organisms/9713583
Regards