Question

study the image of a plant. which gas is cycled into the atmosphere at the arrow? oxygen nitrogen water vapor carbon dioxide

Explanation:

Photosynthesis is the process by which plants use sunlight, carbon dioxide ($CO_2$), and water ($H_2O$) to produce glucose ($C_6H_{12}O_6$) and oxygen ($O_2$). The chemical equation for photosynthesis is $6CO_2 + 6H_2O \xrightarrow{sunlight} C_6H_{12}O_6+6O_2$. Oxygen is released into the atmosphere as a by - product of this process. Nitrogen is not a direct product of photosynthesis. Water vapor is related to transpiration (a different process in plants where water is lost from leaves) and not the main gas produced in photosynthesis. Carbon dioxide is taken in by plants during photosynthesis, not released.

Answer:

oxygen