Question

1. the fourth paragraph primary serves to: a explain how decorative images were created based on the female form. b emphasize how art nouveau influence was visible throughout paris. c describe how art nouveau expanded from architecture into poster - art. d challenge the assumption that art nouveau was merely limited to iron buildings.

Explanation:

The fourth - paragraph mentions that Art Nouveau designs were visible in the advertising posters that decorated Paris, and then names some artists and how their posters utilized female forms and certain design elements. This emphasizes the wide - spread influence of Art Nouveau in Paris through poster art.

Answer:

B. emphasize how Art Nouveau influence was visible throughout Paris