North America is the only continent that is exclusively in the Northern and Western Hemispheres.
North America is located in the western but not the Southern Hemisphere.
The continent that is (mostly) in the southern hemisphere and is also in the western hemisphere (hence, in the south-western quadrant) is South America.
Asia
Southern and western hemispheres
South America is in the Western Hemisphere and also in partially both the Northern and Southern Hemispheres. Africa is partially in the Western Hemisphere and too spans both the Northern and Southern Hemispheres.
South America
South America is the continent in the western hemisphere that is partly in both the northern and southern hemispheres. The Equator runs through the northern part of the continent, dividing it into northern and southern hemispheres.
South America
Antarctica is the continent found completely in the southern hemisphere and split between the eastern and western hemispheres.
Both, in fact the continent "Africa" as a whole is in all4 hemispheres (Northern, Southern, Eastern and Western).
It is completely in the southern hemisphere and partially in each of the western and eastern hemipsheres.
South America is the continent in the western hemisphere that is partly in the northern and southern hemispheres. The equator runs through the continent, dividing it between the two hemispheres.