Which term describes a tool used by the author to enliven and provide voice to the text?

The term that best describes a tool used by the author to enliven and provide voice to the text is a literary device. Literary devices encompass techniques such as metaphors, similes, imagery, and symbolism, which authors employ to enhance their writing, making it more engaging and expressive. These tools allow the author to convey deeper meanings, evoke emotions, and create vivid images in the reader's mind, all of which contribute to a more dynamic and impactful reading experience.

In contrast, literary elements refer to the fundamental components of a literary work, such as plot, character, and setting; while these are crucial for understanding a narrative, they do not specifically pertain to the tools that enrich the text. Key words relate more to vocabulary choices that might highlight particular themes or tones but do not embody the broader array of techniques used in crafting the narrative's voice. Literary movements refer to specific trends or styles in literature over periods, which do not relate to the individual techniques an author employs in their writing. Such distinctions clarify why literary device is the most appropriate choice in this context.