Answer:
A. It describes the setting of the story
Step-by-step explanation:
The description of the river as "the color of mud" and the wind "singing through the bright green trees" contributes to a vivid impression of the landscape surrounding the protagonists (setting). This figurative language depicts a tranquil river and a verdant rainforest, setting the stage for the events that follow. It aids the reader in visualizing the environment and generates a sense of peace and natural beauty.