Question

what is sedimentation,decantation and filtration?

Answer 1

when the dirt in the water settles at the bottom of the container it is called sedimentation.
decantation????
the process by which water filter's is called filtration.

Answer 2

thesee are the different ways to purify water.
sedimentation - it is the process in which the sediments settle down after 2-4
hours in water.
decantation -  it is the process in which all the settled down impurities are not disturbed and the fresh water is poured into different container.
filltration - it is the process in which the water is filtered by using a filter paper.