List the causes of natural degradation and classify them as natural and anthropogenic causes.

All the human causes of global environmental change happen through a subset of proximate causes, which directly alter aspects of the environment in ways that have global effects.

Explanation:

The important proximate human causes of global change are those with enough impact to significantly alter properties of the global environment of potential concern to humanity. The global environmental properties now of greatest concern include the radiative balance of the earth, the number of living species, and the influx of ultraviolet (UV-B) radiation to the earth's surface (see also National Research Council, 1990b).

the correct answer is - they each vary in size and temperature.

the layers of the earth are not monotone, they are all different, have different sizes and properties.

the four layers are the outer crust, the mantle, the outer core, and the inner core.

the outer crust is solid. it is the top layer, the one we live on, and it is also the smallest and coldest one.

the mantle is lying right bellow the outer crust. it is much bigger, and much hotter, and it is also the layer that influences heavily the upper crust layer with its convection currents.

the outer core is liquid, very hot, relatively big, and it is the third layer (top to bottom).

the inner core is the hottest layers, it is occupying the central part of the planet, and it is the basis on top of all other layers lie on.