This district is composed of certain quiet, low-density residential areas plus certain open areas where similar residential development appears likely to occur. The regulations for this district are designed to stabilize and protect the essential characteristics of the district, to promote and encourage an enjoyable environment for family life, and to prohibit activities of a commercial nature. To these ends, development is limited to single-unit dwellings providing homes for the residents plus certain other uses, such as schools, parks, churches, and public facilities that serve the residents of the district.