Answer:
Classification is a systematic ordering of the object of research, in this case, ecosystems at the earth's surface or, in other words: landscape units as 'holons'. As for general principles of classification, we can learn a lot from the best-known classification, the taxonomical classification of species.
Explanation:
I think the correct answer is A
The Van Allen belts are created by a planet's magnetic field. Therefore C. Earth's magnetosphere is the correct answer
