How are contrasted moods achieved from section A to B in raindrop?

Contrasted moods from section A to B in "Raindrop" are achieved through changes in dynamics, tempo, and harmonic structure. Section A typically features a lighter, more delicate texture with soft dynamics, evoking a tranquil feeling. In contrast, section B introduces a more robust and dramatic character, often utilizing stronger dynamics and a faster tempo, creating a sense of urgency or tension. This shift in musical elements effectively highlights the emotional transition between the two sections.