Final answer:
The figurative language 'fierce young hound' is used to compare Pip to a determined and eager dog in aiding the convict, enhancing the imagery of Pip's character and actions in 'Great Expectations'.
Step-by-step explanation:
In the excerpt from Chapter 3 of Great Expectations, where Pip is referred to as a 'fierce young hound', the purpose of this figurative language is to compare Pip to a dog used to hunt down criminals. This metaphor highlights the intensity and desperation of Pip's actions as he aids the convict, suggesting his eagerness and potentially his naivety, akin to a young, enthusiastic dog. It does not personify an actual pet of Pip's, describe the outward appearance of the convict, or emphasize the differences between Pip and the convict.
The use of figurative language, including metaphors and personification, is prevalent in literature, as it enhances the imagery and can convey complex ideas succinctly. Authors like Dickens often rely on such language to create vivid comparisons or to evoke certain emotions in the reader. For instance, referring to someone as a 'hound' can not only bring forth an image of a determined, possibly relentless character but also connote a sense of being lower in hierarchy or subservience, encapsulating the dynamic between Pip and the convict.