I think the first sign that made people question whether the king was Peter Wilks's English brother was his illiteracy and inability to write. He confuses the word funeral obsequies and instead uses funeral orgies.
The coal miner represents the fossil fuel energy necessary for generating electricity that powers various devices. The cartoon illustrates that, despite electronic devices decreasing paper usage and forest depletion, they are not entirely environmentally friendly due to the reliance on coal. The burning of fossil fuels, represented by coal, results in significant pollution and various environmental issues.
Thomas Jefferson was simply informing the king of England that colonial America was no longer under British control.
Its nature mimics the way the speaker meanders. It establishes a bond between the speaker and the reader. It contributes to a relaxed and informal tone. It also aids the speaker in achieving a philosophical and unique expression, demonstrating a connection to humanity as a whole.