Genetic improvement is a way for people to make plants and animals stronger, healthier, and hardier. It is done by taking DNA from plants and animals and changing it in the laboratory so that it has better traits. This is done by taking the DNA from two different plants or animals and combining them together so the new plant or animal has the best qualities from both of them. Scientists can also make changes to the DNA to make sure that the plant or animal will be healthier, bigger or better-looking. This way, people can make really strong animals, plants and crops.