Verified Answer :

According to the theory of evolution, birds' feathers evolved from "reptile scales"--specifically those of dinosaurs, since these became increasingly valuable over very small arms.

According
to the study of evolution, the evolution of the bird’s feathers came from the
reptile scales. They explain the theory of evolution of the bird’s feathers from
the scales of the dinosaurs that lived a very long time ago. They showed the
evolution like this:

The Crocodilians
à The
Archosauria à The
Dinosauria à The
Saurischia à The
Therapoda à The
Coelurosauria
à The Maniraptora à Aves à Birds . This is how
they believed birds feathers were evolved in the present.