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2. As water passes through the rock layers of the earth it is cleaned by...
1.Sedimentation
2.Flocculation
3.Filtration
4.Aeration
5.Disinfection


Sagot :

Answer:

Filtration

Explanation:

is a process by which impurities or particles are removed from a fluid, either a liquid or a gas. The liquid, or feed, is poured over a filter, which catches particles and allows filtered liquid, or filtrate, to move through it.

I'm in middle school, and I answered an basic question for you. Come on man, all you have to do is look up the definition.