The setting is The Amazon rainforest is the world’s largest tropical rainforest, spanning 2.1 million square miles across nine South American nations, primarily Brazil. Often called the "lungs of the planet," it plays a critical role in regulating Earth's climate by absorbing vast amounts of carbon dioxide. The forest is defined by its dense, multi-layered canopy that blocks out most sunlight, creating a dark, humid underworld on the forest floor. It is fueled by the massive Amazon River, which discharges more water than the next seven largest rivers combined. This vast ecosystem is a global hotspot for biodiversity, harboring roughly 10% of all known species on Earth. It is home to millions of distinct plants, insects, birds, and mammals, from jaguars and pink river dolphins to countless uncataloged organisms. Beyond its rich wildlife, the Amazon is home to over 30 million people, including hundreds of Indigenous groups who rely on and protect this indispensable, yet heavily threatened, ecosystem.