What best describes a human influence on the biogeochemical cycles?

Human activities significantly impact biogeochemical cycles through actions such as deforestation, industrial pollution, and fossil fuel combustion. These practices disrupt natural processes by increasing greenhouse gas concentrations, altering nutrient flows, and contaminating soil and water systems. For example, excessive nitrogen from agriculture can lead to eutrophication in aquatic ecosystems, while carbon emissions contribute to climate change. Overall, human influence often results in imbalances that threaten ecosystem health and biodiversity.