Answer :
The author's purpose is to evoke empathy, illuminate racial injustices, and highlight the emotional difficulty of explaining discrimination to children, fostering a deeper understanding of the civil rights movement.
The author's purpose for including the sentence "You suddenly find your tongue twisted and your speech stammering as you seek to explain to your six-year-old daughter why she can't go to the public amusement park that has just been advertised on television, and see tears welling up in her little eyes when she is told that Funtown is closed to colored children" is to evoke empathy and to illuminate the injustices and discrimination faced by African Americans, particularly children, during the era of segregation. It powerfully conveys the emotional difficulty of explaining racial inequality to innocent children and underscores the dehumanizing nature of racism. This discourse aims to engage the audience on an emotional level, stirring them to reflect on the consequences of prejudice and to foster an understanding of the civil rights movement's urgency.