Using the example of chickens, explain the changes in birds during domestication.

All pets were domesticated at some point. They have wild ancestors. In the course of human domestication, they acquired new characteristics, adaptations and adaptations. Chickens have not changed much. Their ancestors were slightly smaller, could fly and nest right on the ground. They were also very shy. The domestic chicken has become larger in size, has lost the ability to fly for a long time and does not react to humans and even natural enemies that may be near them.