Causes, consequences, and mitigation strategies for each disaster

Correct answer: B. Search for employment

Migration is the movement of people from one place to another, either temporarily or permanently. A major governing idea in population geography is that migration may be caused by economic, social, political, or environmental conditions. Searching for employment is a common economic motive because people may move toward places offering jobs, higher wages, or better livelihoods. Earth’s rotation, a lunar eclipse, and ocean tides are natural phenomena, but they are not ordinary direct explanations for human migration. Other genuine causes include education, marriage, conflict, disasters, and environmental stress. Therefore option B is correct.

Correct answer: A. Alerting people in advance

A disaster warning system detects or monitors a hazard, analyses expected danger and communicates timely information to exposed communities. Warnings about floods, cyclones, tsunamis or severe weather give people time to evacuate, protect belongings, move livestock, arrange medicines and follow official instructions. This advance action can reduce deaths, injuries and property loss, so option A is correct. A warning cannot remove every effect of a disaster and cannot stop a natural hazard from forming; therefore options B and C are exaggerated. Information delivered only after the event is too late to provide the main benefit. The governing concept is early warning linked with preparedness, communication and effective response.