Xavier and Juan have started a clothing company in which they intend to sell quality children's clothing to "the world's children" at a fraction of the cost of other outfitters. And, with the small margin of profits they do make, they plan to invest much of that into a program that offers their clothing free to cultures in villages located in remote places where it is sorely needed. They want the world to be a place where "no child goes without a shirt on his or her back." What principle are Xavier and Juan most closely following

Why are low-lying lands more suitable for agriculture than hilly areas?

The principle of checks and balances is based on the notion that

As you drive in to school, you hear a random radio-show caller arguing that sun exposure really has not been shown to cause skin cancer and that some research suggests that skin cancer is completely genetic and not related to sun exposure at all. at the time, you think that this is a silly argument and that the caller does not know what she is talking about. however, two months later, you are outside without wearing sunscreen, and you find yourself remembering that you had read something about how the sun actually does not cause skin cancer. this process is evidence that has influenced your attitude