For a literary analysis, what are the elements of romanticism in this passage and how does it develop the plot?

"The pleasant showers and genial warmth of spring greatly altered the aspect of the earth. Men who before this change seemed to have been hid in caves dispersed themselves and were employed in various arts of cultivation. The birds sang in more cheerful notes, and the leaves began to bud forth on the trees. Happy, happy earth! Fit habitation for gods, which, so short a time before, was bleak, damp, and unwholesome. My spirits were elevated by the enchanting appearance of nature; the past was blotted from my memory, the present was tran-
quil, and the future gilded by bright rays of hope and anticipations of joy."

Mary Shelly's Frankenstein or The Modern Prometheus