One or more equations used to represent many common situations are?

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.

He want to contact the red cross/red crescent because they are the main non profit organization that deals with disasters around the world