Post #2 - Diction

Diction is the words that the author chooses to use.

Diction can affect the tone and mood of a passage, as well as the style of a literature work.
Whichever words that the author picks will bring the words' inherent connotations into the passage. For example, the two synonyms insidious and deceitful both are perceived differently when describing a person. Although they are considered to be synonyms, using deceitful to describe someone would mean that they deceiving and misleading, whereas using insidious would mean that they are treacherous, but almost unnoticed.
Diction is also used to form the style of writing in a work of literature. The author, rather than use a proper word to name something, might decide to use a slang word to name the same thing, possibly to bring into the work a cultural context or to help fixate the setting.