[tex]\huge \color{gold}{ \mathbb{ANSWER}}[/tex]
- RIVER
- a. It is easy to get.
[tex]\huge \color{gold}{ \mathbb{EXPLANATION}}[/tex]
- All freshwater ultimately comes from precipitation of atmospheric water vapor, reaching inland lakes, rivers, and groundwater bodies directly, or after melting of snow or ice.
- Groundwater is reliable during droughts, while surface water can be quickly depleted. Groundwater is, in general, easier and cheaper to treat than surface water, because it tends to be less polluted.
[tex]\small\color{black}{\rm{\fcolorbox{black}{gold}{© gimcheonsa8}}}[/tex]
