Which of the following is NOT one of the four principles of effective sentences?

The principle of using complex sentences for clarity is not typically considered one of the four core principles of effective sentence construction. Instead, effective sentences focus on simplicity and clarity, which often means favoring straightforward structures. While complex sentences can add depth to writing, they can also lead to confusion if not crafted carefully.

On the other hand, emphasizing one idea while de-emphasizing another helps ensure that the main point of the sentence stands out clearly. Maintaining unity is crucial as it ensures that all elements of the sentence are related and contribute to a single idea or theme. Lastly, using active voice contributes to the clarity and directness of writing, making it more engaging for the reader. Collectively, these principles support effective communication, helping to convey messages clearly and effectively.