What does it mean to raise animals in captivity?

Confined breeding is a breeding method currently advocated in modern animal husbandry! The livestock industry is developed by raising livestock in captivity.

Due to the long-term traditional way of raising livestock, some parts of the land have been deserted, exposed mountains, vegetation has been degraded, and serious water and soil erosion has emerged. "She has high yields and low yields, there are many mountains and sparse vegetation, and there is little rain and drought in the fields. The vicious circle phenomenon of "the wind blows and the sand covers the ground"

So at present, pen breeding is the modern animal husbandry method advocated

I hope it will be helpful to you