Subsoil: This layer has normally less organic matter than the A horizon, so its colour is mainly derived from iron oxides. Iron oxides and clay minerals accumulate as a result of weathering. In a soil, where substances move down from the topsoil, this is the layer, where they accumulate.
Note: This information has been taken out of a website.
Answer:
For Instance, a functional region has a focal point (often a city) and is the organized space surrounding that central location. Examples would be a metropolitan area, such as greater New York City, Chicago, Los Angeles, or the San Francisco Bay Area. otherwise known as Vernacular Region.
the prime meridian is 0* longitute and the equator is 0* latitude.
