Final answer:
The phrase "overcoming adversity" illustrates the literary element of theme in literature.
Step-by-step explanation:
The literary element that is best illustrated by the phrase "overcoming adversity" is theme. Theme refers to the central message or idea in a literary work, and often deals with the struggles and challenges that characters face. "Overcoming adversity" is a phrase that represents a common theme in literature, where characters are shown overcoming obstacles and challenges in their lives.
Learn more about theme in literature