#9 means it has been grown organically. This means it has been grown without pesticides, fertilizers, or antibiotics. They are healthier. Examples include; Apples, Cucumbers, Kale, Bell Peppers
#3, #4 are grown with the above chemicals, so stay away. If you have a budget it's okay to buy these; Sweet Potatoes, Avocados, Onions, Cabbage
#8 means your food has been genetically engineered----GMOs.