Read the passage.
excerpt from Frankenstein by Mary Shelley
No youth could have passed more happily than mine. My parents were indulgent, and my companions amiable. Our studies were never forced; and by some means we always had an end placed in view, which excited us to ardor in the prosecution of them Perhaps we did not read so many books, or learn languages so quickly, as those who are disciplined according to the ordinary methods; but what we learned was impressed the more deeply on our memories
I feel pleasure in dwelling on the recollections of childhood, before misfortune had tainted my mind, and changed its bright visions of extensive usefulness into gloomy and narrow reflections upon self. But, in drawing the picture of my early days, I must not omit to record those events which led, by insensible steps, to my after tale of misery; for when I would account to myself for the birth of that passion, which afterwards ruled my destiny, I found it arose, like a mountain river, from ignoble and almost forgotten sources; but, swelling as it proceeded, it became the torrent which, in its course, has swept away all my hopes and joys.
How does Shelley combine two literary devices in this excerpt to develop the novel?

She uses symbolism to illustrate the idea of childhood and foreshadowing to hint at childhood's unhappy end.

She uses flashback to drive character development and foreshadowing to hint at how the character will go bad.

She uses flashback to drive character development and allegory to link the character with the theme.

She uses imagery to flesh out the setting and a subplot to contrast with the main plot.