When a river floods , that river deposits soil in flood plains, and soil erosion harms farm and grazing lands and increases flooding and desertification. Given these facts, when a river floods, that river harms what among the following options:
- most organisms
 - Basic units of the plant body.
 - streams and volcanoes
 - mountains and lakes
 - farm and grazing lands
 - oceans and ponds
 - swamp vegetation
 - Plant growth is reduced


 

     farm and grazing lands    