Culture is made up of interconnected parts including tangible culture traits like diet, fashion, and religion. Culture traits are influenced by the physical environment. For example, camel beauty contests are common in Saudi Arabia due to the desert environment making camels more practical than horses. Closely related to culture traits are culture complexes, which are combinations of culture traits that support each other. An example of a culture complex given is religions and their associated customs and holidays. A culture system develops as patterns emerge from the interactions of culture complexes. The United States can be considered a culture region due to its unique combination of location, culture, and environment.