GEOLOGY

Detailed explanation-1: -The correct answer is Groundwater poisoning. It is an undesirable catastrophe resulting from forces that are largely beyond human control, strikes quickly with little or no warning, and causes or threatens serious disruption of life and property. For example, earthquakes, tsunamis, cyclones, floods, etc.

Detailed explanation-2: -A physical event, such as a volcanic eruption, that does not affect human beings is a natural phenomenon but not a natural hazard.

Detailed explanation-3: -Natural hazards can be classified into several broad categories: geological hazards, hydrological hazards, meteorological hazards, and biological hazards.

Detailed explanation-4: -Disaster risk management. Mountains are hazardous places. Many mountain communities live under the threat of earthquakes and volcanic eruptions caused by shifting tectonic plates. Gravity pushing down on sloping land compounds the destructive power of storms and heavy rains, producing avalanches, landslides and floods.

Detailed explanation-5: -Mountain regions are rife with hazards, like floods, droughts, landslides, and glacial activity.