Meewhat is a hemisphere?
a) the line of longitude known as the prime meridian
b) one-fourth of the area on earth c) the line of latitude known as the equator
d) a half of the world, split by either the prime meridian or the equator

The answer is d. a half of the world, split by either the prime median or the equator nextreset

 A Hemisphere is half of a sphere or a half of the earth, usually as divided into northern and southern halves by the equator, or into western and eastern halves by an imaginary line passing through the poles or a half of the celestial sphere.  

which is know as the answer to be
 

D.a half of the world, split by either the prime meridian or the equator Next reset