Mesosphere is the layer after stratosphere, which is after troposphere, as seen from Earth in the direction of Space.
It starts at 60 km and ends at 120 km, after which comes the termosphere.
So we're looking for a line that's closest to 100 km, and this is the shortest line, A.
Bc the sun reflects on the other side of America or country and that’s why we have time zones
Sphere because of the sun orbit around the solar system
National-building began in Europe as a result of war and the growth of cities.
South Africa is the most stable country south of the Sahara
