Which of the following is the best practice for following up on an unanswered email?

Sending a reminder email politely is indeed the best practice for following up on an unanswered email. This approach demonstrates professionalism and respect for the recipient's time, while also reaffirming your interest in receiving a response. A polite follow-up provides an opportunity for the recipient to remember your initial message or to acknowledge that they may have overlooked it. This method encourages communication without coming across as aggressive or demanding, fostering a positive rapport.

On the other hand, waiting a week without any follow-up may cause important matters to be overlooked and can lead to delays in communication. Sending multiple emails in one day might overwhelm the recipient and could be perceived as impatience or pressure, which is generally counterproductive. Lastly, waiting until the next semester to follow up could result in missed opportunities and can make communication less relevant or timely, especially if the matter is urgent. Thus, a polite reminder strikes the right balance between professionalism and persistence.