Neco 2020 Literature In English Question 7

Consider the following 14‑line poem: When winter's chill has frozen all the field (A) The barren earth seems mute, its colors dim (B) Yet hidden roots beneath the frost will yield (A) A sprout that pushes through the icy rim (B) The sun, though shy, begins to paint the sky (C) With amber hues that melt the frosted glaze (D) Each ray a promise that the cold will die (C) And buds awaken in the softened haze (D) But sudden clouds descend, the light retreats (E) The wind now howls, a bitter, sharp rebuke (F) The sprout bends low, its vigor now depletes (E) Yet deep within, a stubborn will rebukes (F) When warmth returns, the sprout will rise anew (G) And claim the spring, its triumph bold and true (G) Identify the poetic form and explain how the turn at line 9 (the volta) influences the poem's meaning.