What does manipulation of language in literature mean?

It means the way the writer uses the language to convey meanings, feelings e.t.c. In another context it may mean the way the writer uses language in order to manipulate the reader and lead him where he/she desires e.g. to feel in a certain way about a character, to have certain expectations e.t.c.

answer; i believe that the correct answer is (north and south);

the correct answer can either be a or b because it could be both but you should probally choose b