The answer to your question would be that the object or concept that stands as an example of personification is the following one: Ribbons. That is, the correct option would be C.
Personification is a figure of speech in which a thing (an idea or an animal) is assigned human features. By means of personification, 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 ribbons are portrayed as if they were capable of dancing, just as humans do.
