Well, Africa is a continent that is very rich in terms of resources, and is readily developing as a nation. One reason would that solar energy would be one of the main sources because of its open land, second, the available waters fr hydroelectric and wind. And lastly, the nation is still coming of age, where many ideas could still be implemented in the region such as renewable energy.
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Deserts are A) dry with little organic matter. Although it seems that D might be correct in fact it is not because desert soil is not totally unable to support plant life because in fact some plants grow in the desert and especially following a rain storm the desert can bloom with plant life.
The protostar is a new star that is formed at the end of the Hayashi track and is luminosity temperature relationship of infant stars that are less than M 3. The protostar ends its period and becomes a Tauri star that is extremely luminous.
After which the main sequence of the stars are formed is the next stage in stellar evolution and is dependent on its mass like the sun after this period the star turn red as it has a hydrogen-rich core and it starts to branch out displaying extreme density.
The last stage is the white dwarf star as the star has degenerate and left is the exhaust core which is very dense.
