Provide the link to the text so I can help you.
Answer:
A a visual trick
Explanation:
illusion is tricking your eyes into seeing something
The answer is A
<span>He gives an example of finding words to describe concrete items and abstract ideas.</span>
I believe you should pause B. at the end of lines 2 and 7.
You should pause at the end of line 2 because there is a coma at the end, and at the end of line 7 because there is a full stop, the end of his monologue.
There shouldn't be any other pauses in between, because the thought is transferred into the following line, which is known as enjambment.