To analyze the artwork "Landscape with Classic Ruins and Figures" by Marco Ricci and Sebastiano Ricci, the best question from your list would be:
"How did the artist use vanishing point(s) and orthogonal lines?"
This question focuses on the technical aspects of the composition, which are crucial for understanding the structure of the painting and the way the artists guided the viewer's eye through the landscape. Analyzing the use of perspective techniques like vanishing points and orthogonal lines can reveal how the artists constructed space and depth, which enhances your critique of the artwork overall.