Final answer:
The key factor that a teacher should incorporate during the presentation phase is student engagement, emphasized through dynamic delivery and interaction. Techniques like gestures and eye contact should be balanced to not distract from the subject matter, while teaching materials should support active learning.
Step-by-step explanation:
An important factor a teacher needs to incorporate into the presentation phase of their instructional delivery is C) Student engagement. Engaging students in the learning process is crucial as it encourages them to participate actively, increasing their ability to understand and retain information. The Instructor's answer guide suggests that instructional content should be delivered in a dynamic and interesting manner to maintain student attention and facilitate interactive learning.
Furthermore, the use of gestures, facial expressions, and eye contact can help to create a sense of community and trust within the classroom. However, it is important for the instructor to find a balance and use these techniques purposefully so as not to distract from the content. Additionally, whether in virtual learning or face-to-face settings, the instructor's materials like PowerPoint lecture slides should serve as a starting point to build engaging and participatory lectures.