Final answer:
The word 'LARGE' is related to 'ELEPHANT' as the word 'SMALL' is related to 'MOUSE'.
Step-by-step explanation:
In analogy, the word 'LARGE' is related to 'ELEPHANT', and the word 'LARGE' is an adjective that describes the size of the elephant. Similarly, we need to find an adjective that describes the size of a mouse. Among the given options, the adjective 'SMALL' best describes the size of a mouse. Therefore, the correct answer is D) SMALL.