We learn the three appeals of an argument at a very young age and are not aware of it.  As a child depending on the reaction(s) of your parents [the audience] you learn which argument type they are more likely to listen to in a given situation.   
As a teenager you want a car. Do you go to your parents and just ask them for a car?  No, you prepare an argument using appeals or strategies of persuasion.  
First you might take the logical approach and point out all the reasons that you driving your own car would assist the family.
·         Your parents won’t have to chauffer you around anymore
·         You could assist with chauffer duties of younger siblings
·         You would be home quicker leaving more time to study

Next, ethical approach and show what a responsible person you have become.  Discuss your good study habits and grades. You have been assisting around the house without being asked to.  Having good grades shows credibility and helps that insurance give discounts for them. 

The emotional appeal, if your parents are buying a car they will want the safest vehicle they can afford for you, they are concerned for your well being. You would point out all the safety features of the car, do your homework and have crash test scores available to compare. 
Do your research; having the great fuel mileage and resell value data to show would be appealing logically. Suggesting a contract agreeing to curfew, etc would be appeal ethically.  Depending on the type of parent the emotional and ethical appeal is what I would use as a closing argument.  Above all else parents want their children to be safe. 

Du Bois understood that you can give logical and ethical reasons in an argument about social injustice but to get understanding and sympathy you must use emotional appeal.  The audience must relate in their heart; they must feel personally connected. 

Thoreau uses all three appeals in his passage about injustice.  Society then had many ‘self made men’ they did not go work for someone else; they ate what they grew and built what they lived in.  Taxes on property without an income would have been a threat to not only his life but that of all his family and fellow countrymen.  He used examples that they could relate to and feel in their hearts.