Community Supported Agriculture (CSA) is an alternative model for the distribution of agricultural products directly from the farmer to the consumer, it consists of a group of people who form a cooperative to grow and consume food. Through this socio-economic model, consumers lend their support to producers, in exchange for a direct and regular delivery of biological products, that is, producers and consumers support each other and share the benefits and risks of food production.
Imagine your at school or where ever you wanna be and you see a girl/boy that you really like because of their lips or how great their hair looks or the size of their eyes or what ever else. ( Sorry for some of those very visual images there... ) That's called selective breeding.