Satires are use by author to create a piece that is made of "sarcasm, mockery" yet in a way that they will make the piece funny. They use it to deliver funny messages yet in a way that is "offensive"...
This is a sophisticated issue. Tone is actually in the domain of speech; it is how the voice indicates the attitude or feeling of the speaker, such as a mournful tone, an angry tone, a respectful...