What is an Adverb phrase?

Astudent wants to replace the underlined word to make the meaning more precise.which phrase would be the best replacement for the underlined phrase ?

Which statement best describes the type of appeal used in this public service advertisement? an emotional appeal is made by presenting a wide range of jobs for women. an emotional appeal is made by emphasizing the need for a peaceful approach. an ethical appeal is made by providing pictures of a variety of role models. a logical appeal is made by including words that explain the meaning of the poster.

In the song mallam sile sings in lines 113 through 130 the knife probably represents