"Roundish" is the clear winner so far as I know.
(The actual shape of Earth is not a sphere; it's a "geoid", but saying "Earth is a geoid" is pretty much a tautology, since it amounts to saying "Earth is Earth-shaped.")
The Lithosphere.
you will find it in earths mantle because it is a kind of an igneous rock
most volcanoes are formed from a hot spot in the earths crust.
one of the common minerals that make up most of the rocks of the earths crust
Thermosphere
the answer to your question is most likely to be honey.
The upper class was more likely to look for new forms of entertainment.
it is most likely to be in new Orleans
Depends on what they produce. Phytoplankton are the largest producers of oxygen. Various forms of bacteria and some other life forms are the largest producers of methane. Fish as a whole are likely the largest producers of ammonia. The ocean is a complex biome, be more specific with your question.
visible light
An attorney most likely.
metals