Juxtaposition is a literary and artistic technique that involves placing two or more contrasting elements side by side to highlight their differences. This can enhance the meaning of each element, making the contrasts more pronounced. For example, in literature, an author might juxtapose a character's wealth with another's poverty to emphasize social issues. In visual arts, juxtaposition can be seen when an artist places bright colors next to dark ones, creating a striking effect. This technique is often used in photography, where contrasting subjects, like nature and urban environments, can evoke strong emotional responses and provoke thought about their relationship.