Final answer:
The climate zones that dominate the northern portion of South America are the Tropical Rainforest and the Savanna climate zones.
Step-by-step explanation:
The two climate zones that dominate the northern portion of South America are the Tropical Rainforest and the Savanna climate zones. The Tropical Rainforest climate is characterized by high temperatures and rainfall throughout the year, supporting dense vegetation and diverse ecosystems. The Savanna climate is characterized by distinct wet and dry seasons, with less rainfall and more grassland areas compared to the rainforest.
Learn more about Climate zones in northern South America