One of the key functions of vocalics is to add emphasis to our verbal messages to influence the meaning. Explain the difference in meaning between following statements based on which word is...

One of the key functions of vocalics is to add emphasis to our verbal messages to influence the meaning. Explain the difference in meaning between following statements based on which word is emphasized in bold italics: “
She
is my friend.” “She is
my
friend.” “She is my
friend
.”