Explain giving examples how artificial selection has helped in the formation of newer varieties of cauliflower

Explanation

Humans have far more than 2000 years cultivated wild cabbage as a food plant and generated different vegetables from it by selection. This process since it was done artificially is called artificial selection.
Ex- some farmers wanted to select the plant for short distances b/w the leaves and thus have artificially bred cabbage we eat. Some have wanted to select for arrested flower development, and have bred broccoli, or for sterile flowers, and have made the cauliflower. Some have selected for swollen parts, and come up with kohlrabi. Some have simply looked for slightly larger leaves, and come up with a leafy vegetable called kale.