Final answer:
The S-shape is the characteristic feature of the Rococo arabesque style, known for its elaborate ornamentation and playful details.
Step-by-step explanation:
The characteristic feature of the Rococo arabesque style is the b. S-shape. Rococo is known for its elaborate ornamentation, asymmetrical values, pastel color palette, and overall playful, light-hearted feel. Rococo furniture, such as the work of Charles Cressent, often features complex, sculptured forms that are gilded and applied to pieces, including the intricate S-shaped curves and small cherubs typical of the style. These elements demonstrate the flowing, dynamic lines and ornate detailing that distinguish the Rococo arabesque style from others.