1. Repetition of words is used as rhetorical device where the readers can see repeating of some word or words in a short space of those words. This kind of language device is used in many language such as English, Chinese and more. It can appear in both, poetry and prose. It is also used to add emphasis to the artwork and it can also give the readers attention on idea that will be the main key of the artwork.
2. A mellow mood is created by the repetition of the words. That kind of mood is giving the readers softer or more relaxed mood. It is also giving the readers the mood like something is falling down and it is getting more silence. People can have feel of tranquility and calmness while reading something that is having a mellow mood or effect on them. The word ''mellow'' is also used when people are describing that the more they are getting older, the less they are aggressive or short tempered.
The sentence <em>Sickly people cost the company a whole boatload of dough </em>is not acceptable because the sentence contains a loaded word as well as slang. You cannot use slang words such as <em>boatload </em>or <em>dough </em>in formal English.
