How do negative connotations used in writings help to support an author’s purpose

Appropriate diction is important because the author’s or character's attitude is often expressed through the words and details he or she selects.

For example, sad stories are usually written with words containing negative connotations which includes various words that describe feelings, judgments, or opinions to the reader.  

Some negative connotations are likely to include experiences, senses, feelings, and thoughts to convey in an effective way to the reader.

she could put on music that makes her sleep

can you type the questions out? we cant really see anything