The correct answer is D. All of the above.
Human activities can increase the risk and severity of natural hazards through land-use changes, environmental degradation, and unsustainable development practices.
Land-use changes can increase the risk of natural hazards by altering the natural landscape. For example, deforestation can increase the risk of flooding and landslides, while urbanization can increase the risk of heat waves and droughts.
Environmental degradation can also increase the risk of natural hazards. For example, pollution can make floods more severe, while climate change can make droughts and heat waves more frequent and severe.
Unsustainable development practices can also increase the risk of natural hazards. For example, unsustainable agriculture can lead to soil erosion and landslides, while unsustainable mining can lead to subsidence and flooding.
It is important to understand the ways in which human activities can increase the risk and severity of natural hazards so that we can take steps to mitigate these risks.