Question

how do human activities primarily affect the carbon cycle?
o through nitrogen fixation
o through deforestation and burning fossil fuels
o through hunting and fishing
o through water consumption

Explanation:

Deforestation reduces plants that absorb carbon - dioxide, and burning fossil fuels releases large amounts of stored carbon into the atmosphere. Nitrogen fixation affects the nitrogen cycle, hunting/fishing and water consumption do not primarily affect the carbon cycle.

Answer:

Through deforestation and burning fossil fuels