Which of the following forests are often called the “Lungs of the Planet”?

Answer: Amazon rain forests are often called the "Lungs of the Planet." They have huge area and dense vegetation with very high rates of photosynthesis, which produces large amounts of oxygen.

They absorb and store large quantities of carbon dioxide, acting as a major carbon sink and helping regulate the global climate.

They support immense biodiversity and maintain global biogeochemical and hydrological cycles.

Nuance: Although these forests produce large amounts of oxygen, much of it is consumed locally by plant and soil respiration and decomposition. The label 'Lungs of the Planet' highlights their ecological importance rather than implying they provide the majority of Earth's net oxygen. Correct choice: Amazon rain forests