Answer:
The answer is B
Explanation:
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They can be restored by nature
Since the plates fold upward, large mountain ranges will form.
Answer:
The spectral types and sub-classes represent a temperature sequence, from hotter (O stars) to cooler (M stars), and from hotter (subclass 0) to cooler (subclass 9). The temperature defines the star's "color" and surface brightness. ... Stars are also classified by luminosity class.
Explanation: