Give two reasons why people use selective breeding to change the characteristics of plants?

1. To improve crop yields: Selective breeding can be used to develop plant varieties that produce more food, and which are more resistant to diseases, pests, and environmental stresses, such as drought or extreme temperatures.

2. To develop new plant varieties with desirable traits: Ornamental plants, such as flowers and foliage plants, can be selectively bred to create new varieties with different colors, shapes, and sizes. New varieties of fruits and vegetables with improved flavor, texture, color, or nutritional value can also be developed through selective breeding.