Which of the following is not a function of visual aid?
(A) It can magnify words
(B) Can provide suitable intensity of light
(C) Can provide suitable material at proper distance
(D) All of these

Hint: Visual aids are items of a visual manner. Any types of aid, which we can watch, are utilised in addition to spoken information. There are several fundamental ways that various forms of visual communication can benefit in the presenting of business messages.

Complete answer:
Visual aids come under non optical aids. They can magnify words and offer appropriate light and material intensity at appropriate distances.
Visual aids include graphs, photos, video clips, and other images that are utilised in addition to spoken information. It reduces the number of words spoken; for example, instead of reading out your results, you may show a graph of them.
The objective of visual aids is to graphically illustrate a notion that is difficult to describe verbally. They should not just be something for the audience to look at, but should be thoughtfully crafted and presented.
Bar graphs and pie charts are examples of visual aids that are used to depict percentages of products sold and the change in sales over time.

Hence, the correct option is (D) All of these.

Note:
Many people associate "visual aids" for presentations or speeches with PowerPoint (especially long, boring, and uncomfortable PowerPoint), yet PowerPoint is only one sort of visual aid. You should think about all of your options to see which one is the most effective and acceptable for your presentation.