It is likely that Tom picks Myrtle because he thinks she will be an easy woman to control. She is not wealthy, powerful, or socially connected, so she doesn't pose much of a threat to him. Myrtle also readily accepts Tom's fabricated story about being unable to divorce Daisy because "she's a Catholic."
The answer is The sentence gives an example of connotation, because it uses the word colorful to suggest that the stories are interesting and detailed.
