AP Environmental Scienceeasymcq1 pt
A septic system treats household wastewater by
A.settling solids and filtering through soil
B.pumping it directly into rivers
C.boiling all the water
D.storing it forever in the house
Explanation
Core Concept
The tank settles sludge while the drain field percolates effluent through soil, where microbes finish the job — on-site treatment for rural homes.
Correct Answer
Asettling solids and filtering through soil
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