) We recognize carbon dioxide (CO₂) as one of the most important gases driving climate change. Anthropogenic activities have led to an increase of this gas in the atmosphere. although plants and algae fix this gas, diminishing its concentration in the atmosphere. The CO₂ contributions of four zones are shown in the graph below. Based on these results, what biome can be found in each zone?:*

Carbon Dioxide contribution to the atmosphere

10

Millions tons of CO2/year

Zones where samples were taken

A) 1: Forest 2: Ocean, 3: Rural 4: Urban

B) 1: Urban; 2: Rural; 3: Forest 4: Ocean

C1: Rural; 2: Urban, 3: Forest; 4: Ocean

D) 1: Ocean; 2: Forest; 3: Rural; 4: Urban