The subject/noun personified in the example is B. The little kid looked around an elephant-sized bedroom.
This is known as a word which generally functions as the name of a specific subject, set of objects, such as living creatures, places, actions, qualities, states of existence, or ideas
Hence, we can see that option B clearly has a subject/noun personified in the example. The bedroom in the example is being personified to be as big as an elephant, which is referred to as an elephant-sized bedroom.
Personification is a literary device that gives human characteristics to nonhuman things or inanimate objects.
Therefore, it is important to note that when a figure or an object is given human characteristics, it is personified.
Read more about nouns here:
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