Because they are not man made and are part of the earth's natural features caused by the the weathering and erosion of the earth.
Among the choices provided above the answer would be 30%. The 30% of the <span>population practices subsistence farming. Thank you for posting you Geography question here at brainly. I hope the answer will help you. </span>
It's an area that is organized around a focal/nodal point where there is a central focus. The central diminishes as you move outwards from the point. Generally used to display information about economic activities.
