Final answer:
The accurate response is d. setting and eye contact only. The textbook highlights setting and eye contact as key elements in the visual environment for online speeches. However, it's essential to note that the discussion extends to encompass additional elements like font, colors, backgrounds, and accessibility considerations. These factors contribute to establishing a cohesive visual style and ensuring that presentations are inclusive for all audience members.
Step-by-step explanation:
The correct choice is d. setting and eye contact only. The textbook emphasizes the significance of setting and eye contact as pivotal components within the visual environment for online speeches. It is noteworthy, though, that the discussion doesn't solely revolve around these aspects. The textbook delves into a broader spectrum of elements, including font choices, color schemes, backgrounds, and the crucial consideration of accessibility. The comprehensive exploration of these factors aims to guide presenters in creating not only visually engaging presentations but also ones that are universally accessible, fostering inclusivity among diverse audience members.