Juxtaposition means placing two things side by side so as to highlight their differences. Writers use it for rhetorical effect. Writers juxtapose divergent elements frequently: wealth and poverty, beauty and ugliness, or darkness and light
Juxtaposition can have the effect of absurdity or humor, or create a link between elements and images that appear unrelated until they are paired. Writers can also reveal truths about a character through contrasting their traits with another, to achieve a foil.
