Free-Range
Animals raised with a free-range lifestyle have plenty of room to stretch out and eat bugs. This is particularly important for chickens, which need at least two square feet of space at all times. Factory-farming conditions are like living in apartment buildings in big cities: a co-op is formed within the coop, and the poultry have grinding meetings on where to put the satellite dish and how much to tip the doorman at Christmas. As in a human co-op, any new members deemed unsatisfactory or weak are pecked to death. Other free-range items, such as tofu, need less room to grow.
Natural
Pretty much everything is natural, including this sentence. What makes it natural? The fact that it has the word "natural." The only things in this store that aren't natural are the highly coifed blonds who shop here. Natural foods include any combination of natural flavorings, natural ingredients, and a high price, since it's human nature to pay more for anything that we imagine will keep us alive forever.
Conventional
Don't let anyone see you buying this, or you'll forever be associated with bridge games, Norman Rockwell paintings, and missionary-style sex in the minivan parked in the cul-de-sac. Conventional says, "I love the system," and we're not even sure why you're shopping here. You don't want paper or plastic—you have a bag made of the skin of a clubbed infant seal. Oh, you came to grind your own peanut butter? Great. Get your bulk items and go.
Local
This is food grown by local farmers who dislike you because you're living in the subdivision that used to be prime farmland owned by their grandparents. Local food may be purchased at farm stands, which is where your children will someday be buying pot. If you buy local organic foods, you may skip dinner altogether and ascend directly to heaven, where you'll be greeted by 72 varietals of virgin olive oil.
Toxic
As a word of warning, the Surgeon General recommends you don't eat toxics more than three to four times per week. To qualify for this label, a company must pass rigorous standards for disease, unsafe working conditions, and chemical disasters. Just like smoking, drinking, and spending time with your mother-in-law, toxic foods should be avoided by pregnant women. On the plus side, they are frequently on special.