Define "syntax."

The term "syntax" refers specifically to the arrangement of words and phrases to create well-formed sentences. It encompasses the rules that govern how various parts of speech fit together within a sentence to convey clear and coherent meaning. Understanding syntax is essential because it affects the overall clarity and effectiveness of communication. This includes aspects such as sentence structure, punctuation, and grammatical relationships, which all help articulate the intended message.

In contrast, the other options refer to different elements of writing. The choice of words relates to diction, the overall theme pertains to the central idea or message of a piece, and emotional tone involves the mood or feeling conveyed through the writing style. Each of these elements has its own significance but does not directly define what syntax is.