How does human activity impact Earth's systems such as deforestation, urbanization, desertification, erosion, air and water quality, and alternating the flow of water?

Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water. These negative impacts can affect human behavior and can prompt mass migrations or battles over clean water.

digestion

it excretes wastes

the answer would be d : p