The correct answer is A. The beauty of a waterfall
Explanation:
The Romantic period, also known as romanticism was a movement in literature, music, art and other areas that emerged by the end of the 18th century and focused on the emotions and feelings, the admiration for nature and the individual. Additionally, the romantic period used elements from the medievalism in contrast to the expansion of industrialism and technology of that time. Because of this, most romantic works had an emphasis on the emotions including positive and negative ones such as love or horror, the exaltation of nature or elements of it and the sensibility of the individual. Considering this, in the case of poems during the Romantic period one possible topic would be "The beauty of a waterfall" as this topic supports the idea of admiration for the beauty of the elements in nature which is one of the main focus of the Romantic period.