The correct answer is C. idioms. Idioms are phrases which consist of many words which don't seem to be connected in any way, however, they create a new meaning which cannot be simply predicted - you just have to learn idioms by heart. Imagery is using descriptive vocabulary to create vivid images which could be easily imagined; puns are play on words; malapropism is wrong usage of a word.
I would say something very off topic like talking about the eating patterns of dogs or something super random like that, ha! But there are no answers provided so that's all I can say right now!
