Final answer:
Alice's brother is likely to say he doesn't understand her presentation due to complex words and sentence structures. To improve, she should simplify language, clarify her points, and consider her audience's understanding.
Step-by-step explanation:
If Alice's presentation includes many complex words and mostly complicated sentence structures, her brother is likely to respond that he doesn't always understand what she's trying to say. This feedback implies that the language and structure of the presentation may not be clear or appropriate for the intended audience, and could benefit from simplification and clarification. To improve the presentation, Alice could consider revising to create a more natural cadence and tone, explaining cultural context, and ensuring that her rhetorical choices and organizational principles are effectively creating meaning for her audience. Utilizing peer review feedback can be an invaluable step in this process, allowing Alice to refine her ideas and strengthen her language.