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:
https://4d4f.eu/content/nascarmartinsville-speedway-first-data-500-live-stream
Answer:
The answer is A
Typhoons are basically like hurricanes, formed by weather and climate.
Tornados are formed by weather activity.
Floods can happen from weather or tectonic activity, but its more of an indirect effect rather than a direct one.
Earthquakes are from tectonic activity, the right of fire is the boundary of a tectonic plate.
