To enhance the presentation, the most effective approach would be:
They could use small hand gestures to punctuate each of the supporting details for how people benefit from learning a new language.
Using hand gestures can help emphasize key points and make the presentation more engaging for the audience. It allows the presenter to visually represent the ideas being discussed, which can aid in retention and understanding. A fast pace, while it may convey passion, could also lead to information being lost or a lack of clarity in delivery. Therefore, the use of gestures is likely to be more impactful in this context.