What aspect of writing is primarily evaluated in an essay format?

The evaluation of essays primarily focuses on clarity, coherence, and the logical flow of arguments. This is because an essay aims to communicate ideas effectively, guiding the reader through the writer's thoughts in a structured manner. Clarity ensures that the reader understands the main points and arguments being presented. Coherence allows for seamless connections between those points, making it easier for the reader to follow the writer's line of reasoning.

Logical flow is crucial as it establishes how well the arguments are organized and how they build upon one another to support the main thesis. These qualities contribute significantly to the persuasiveness and overall quality of the essay. While vocabulary, length, and the number of sources can add value to an essay, they are secondary to the essential characteristics of clarity, coherence, and logical flow, which are foundational for any successful writing piece.