Answer:
Human factors increasing flood risk: urbanisation , because towns and cities have more impermeable surfaces......
Physical causes of flooding:
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heavy rainfall.
long periods of rain.
snowmelt.
steep slopes.
impermeable rock (doesn't allow water through)
very wet, saturated soils.
compacted or dry soil.
Sometimes Earth's layers are called crust mantle, and core. These are the names of Earth's layers based on their ___ composition.