Genetically modifying the tomato to change the color or quality of the tomato
Injecting color to a green apple
Injecting color to ripen the tomato quicker than normal
GMOs are more helpful than harmful
GMOs are tastier than naturally grown crops because they were genetically engineered that way. You can make sweet foods sweeter and sour foods more sour.
You can make the color of the crop very solid or good so when people see the produce they will know it is fresh. You can also keep the produce longer from perishing.