Figurative language refers to language that uses words in ways that diverge from their literal interpretation to accomplish a more multifaceted or powerful effect. It can expand the interpretations of the ones who read it and extend their conceptions. It emphases on the use of figures of speech that play with the meaning of words, like personification, simile, metaphor and hyperbole. From the options above, the one that best fits with the definition explained is B "can seldom see through/his bars of rage". The metaphor “bars of rage” is a comparison in which these bars are made the equal of the bird’s anger and frustration since its bars forbid its freedom. The author uses personification by saying his instead of its when talking to something referring to the bird.