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.
The best answer is choice C. why? Because the rivers flow from the dry side of Texas to the very wet and damp side of Texas. hope this helped, have an amazing day :)
Coca eradication is an example of a strategy promoted by the United States government in 1961 as part of its "War on Drugs." It consists of eliminating the cultivation of coca, the drug crop whose leaves are used in the manufacture of cocaine.
