The line 'The sun used to smile in my hut' is an example of 'Personification'. Personification is a figure of speech in which a thing, an idea or an animal is given human attributes. The non-human objects are portrayed in such a way that we feel they have the ability to act like human beings. In this case, the sun is given the human attribute of smiling. The other options do not fit the context of the question. 'Rhetorical Question' is a question asked in order to create a dramatic effect or to make a point rather than to get an answer. 'Zeugma' is a figure of speech in which a word applies to two others in different senses. 'Apostrophe' is a figure of speech in which the speaker directly addresses an absent or imaginary person, or some abstraction.