Onemanufacturer'stoothpaste(13)-{tends}todifferverylittlefromanothermanufacturer's.
Thus,manufacturersare(14)-{confronted}withaproblem.
---howtokeepsaleshighenoughtostayinbusiness.
Manufacturerssolvethisproblembyadvertising.
Theytrytoappealtoconsumersinvariousways.
Infact,advertisementsmaybe(15)-{classified}intothreetypesaccordingtothekindofappealstheyuse.
Onetypeofadvertisementtriesto(16)-{appeal}totheconsumer'sreasoningmind.
Itmayofferaclaimthatseemsscientific.
Forexampleitmaysaythedentists(17)-{recommend}Flashtoothpaste.
(18)-{thetruthoftheadvertisingmaybelessimportantthantheappearanceoftruth.
Ascientificapproachgivestheappearanceoftruth.
Anothertypeofadvertisementtriestoamusethepotentialbuyer.
(19)-{Productsthatareessentialboring,suchasinsecticide,areoftenadvertisedinanamusingway}.
Onewayofdoingthisistomaketheproductsappearalive.
Forexample,theadvertisersmaypersonifycansofinsecticide.