Sensory language is a way for the writer to make the reader see or connect with an image, description, action, or scene. It connects to the senses (sight, sound, smell, taste, touch).
An example in this piece of writing is 'The damp leaves', being connected to touch. 'A peppery scent' connecting to smell etc.
I believe your answer is C. The description doesn't suit Wilbur. This is because Charlotte thinks of Wilbur as more of a clumsy pig than he is Supreme. Hope this helped!