You are presented with the question "What may soak into the ground, becoming groundwater?" and the following answer choices: 
- h2o
 - wells
 - H 2 O
 - rain
 - H20
 - blood
 - dust
 - river

Now knowing that some precipitation that falls on land may soak into the ground, becoming groundwater and rain is only one kind of precipitation, choose the best answer.


 

    rain     