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:
I believe that the correct answer to this question would be "produced with the help of <span>ecosystem-based management". Books are often made out of trees, and in order to produce paper, ecosystem-based management is needed.</span>
<span>i think the correct match would be :
B. neotropc south America
if we look at it physically, the Neotropic ecozone includes the tropical terresterial ecoregions of the Americas continent and it also cover the entire Temperate zones of south America.</span>
Hello! Polar climate is in North & South Poles, where the weather there is extremely cold. Just by looking at the answer choices alone, A and B are both eliminated, because it is not hot, warm, or humid. Plus, the weather described in those answer choices does not fit at all. D is out as well, because the weather does not vary in the poles. It is very cold year-round. The only answer choice that even makes sense in this problem is C. Therefore, the answer is C.
