The message the author is trying to convey about the passage
Another important theme in The Giver is the value of the individual. Lowry points out that when people are unable to experience pain, their individuality is devalued.Also, people learn from memories and gain wisdom from remembering past experiences.
This is because the sound you make when you say x is ex thus using a but when you make the b sound it sounds like be.
I believe it would be a soliloquy. A soliloquy is defined as a person speaking to themselves without any regard for someone that may hear it (or oblivious to them).