Two vast and trunkless legs of stone
Imagery of fragmentation and erosion does the work of the argument: power is already broken in the first image.
Language that appeals to the senses, arranged so that a pattern emerges. One vivid image is description; a recurring pattern of images is an argument.
Underline every reference to light, weight, heat or illness in a single chapter. The pattern will usually tell you what the book thinks.
Because the body believes images faster than it believes statements.
Two vast and trunkless legs of stone
Imagery of fragmentation and erosion does the work of the argument: power is already broken in the first image.
Guttering, choking, drowning
The verbs are bodily and involuntary. Owen makes the reader's throat react before the Latin quotation is even reached.
The landscape is described with the same care as the heroine.
Hardy's fields are indifferent witnesses. Nature's beauty never intervenes, which is exactly the point.
Do not list images as decoration. The question is always what the pattern does over the whole work.