MCQ
Floods can be prevented by_______:
- AAfforestation
- BCutting the forests
- CTilling the land
- ✓Removing the top soil
Soil is the uppermost humus containing part of the Earth's surface, which can sustain terrestrial plant life.
Soil is composed of inorganic mineral particles $(45$ percent$),$ water $(25$ percent$),$ air $(25$ percent$),$ and
humus $(5$ percent$).$
Humus is composed up of dead and decaying organic material.
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