Respuesta :
the answer is b. hemisphere because a hemisphere is half of a sphere
I would also agree that the answer is B: hemisphere (it means half of a circle/sphere)
Description of the other words
The atmosphere= the air that encompasses the earth
The hydrosphere= a part of the earth that holds water-vapor, solids, and liquids.
the lithosphere= the looks of the land....landforms
Hopefully this helped and good luck!!!