Absolute magnitude . a) is usually the same as apparent magnitude
b) is how bright a star appears from Earth
c) depends on luminosity and distance
d) is a measure of a star's actual brightness

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the

Wikipedia aswell can be used to solve the following questions

Interacting group of various species in a common location. for example, a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi, constitutes a biological community.