Final answer:
The most efficient solution for Brendan to clean up his slide is to organize the images in a visually pleasing manner and maintain a consistent narrative. Brendan can also utilize techniques such as word clouds, small group discussions, and live polls to engage the audience.
Step-by-step explanation:
The most efficient solution for Brendan to clean up his slide would be to organize the images in a visually pleasing manner and maintain a consistent narrative. He can rearrange the images to create a logical flow and use captions or text to provide context and support the images. Brendan can also utilize techniques such as word clouds, small group discussions, and live polls to engage the audience during the presentation.