Through gravitational compression, earth layers were formed by process called density stratification. this process describe the layer of water in a body of water with a layer of cold dense water at the bottom were the temperatures are above freezing point, A water layer float on top and when the water on the surface coll to about 4 degrees it sinks
Salt Lake City is the answer
Well I am wrong the answer is A for that helps keep the environment clean
Was it the size? I thought I heard it once but I'm not really sure.
