单项选择题
3. Natural processes such as earthquakes, landslides, floods, volcanic eruptions, tornadoes, and hurricanes are considered when they occur in populated areas.
A．hazards
B．tenet
C．erosion
D．landslides
3. Natural processes such as earthquakes, landslides, floods, volcanic eruptions, tornadoes, and hurricanes are considered when they occur in populated areas.
A．hazards
B．tenet
C．erosion
D．landslides