The arrow going from the factory and tractor to the air shows how human activity can cause carbon to move into the atmosphere. The Option B is correct.
This arrow shows the link between human actions and the release of carbon dioxide (CO2) into the atmosphere. The factory and tractor represent industrial and agricultural activities which are significant sources of greenhouse gas emissions.
Factories burn fossil fuels and release carbon emissions during production processes, while tractors, often powered by fossil fuels contribute to carbon release through their operation. As these human activities intensify, the arrow visually represents the flow of carbon from these sources directly into the atmosphere.