Explain with an example evolution through artificial selection.

Artificial selection is the modification of species by selective breeding. Animals or plants with desirable characteristics or traits are interbred with the aim to produce new strain or organisms for a specific purpose. The humans consciously select for or against particular features in this process.

The human may allow only organisms with the desired feature to reproduce or may provide more resources to the organisms with the desired feature. This process causes evolutionary change in the organism and is analogous to natural selection.

It produce disease-resistant plants with better quality and higher yield. It also used in research to produce transgenic animals that breed "true". In agriculture, superior corn, wheat and soybeans are the result of selective breeding. 

The Brassicas (cabbage, broccoli, cauliflower, brussels sprouts, collards and kale) are great examples of artificial selection.