What should be observed first to identify rhythm in a picture?

Correct answer: Which elements are repeated and in what sequence

The governing concept is visual rhythm, which depends on repeated elements arranged in an observable sequence. To identify it, first inspect whether lines, shapes, colours, or forms recur, and then notice their order and spacing. The title, paper size, and frame colour do not by themselves reveal the internal pattern of the artwork. Thus option D is correct because it directs attention to the evidence that actually creates rhythm.