The author should be using allusion, because an allusion is when the reader(s) can imagine they are there eating, tasting it (if ts food) exc. a simile is when your comparing two things, like cats and dogs. Personification is when your giving and item, such as a plate, human emotions.
The 7 deadly sins are as follows: envy, pride, sloth, anger, greed, gluttony and lust. They connect to "an inspector calls" because each of the characters represents one or more of these sins. For example Mr birding is greed because he is always in search for more money.
The answer is sometimes people can be bad, and you always want to follow where your gut leads you too. Sometimes your gut says that you need trust your self. Hope this helps!