Answer:
1. earth quake- the ground is shaking ,the hanging objects are shaking too
2. tsunami-it gives a very strong and big waves
3. landslide-denotes anydown slope movement of soil
4.liquefaction- the soil becomes so wet and so soft
5. volcanic eruption- it cause a ground shaking , the wind also has ashes
OR
- Slippery surfaces e.g. wet or dusty surfaces
- Worn or torn surfaces such as carpets.
- Assisting an unsteady resident.
- Changes in floor heights, unidentified steps.
- Obstructions such as items stored in the corridors.
