You are presented with the question "what falls on land, soaking into the ground and becoming groundwater?" and the following answer choices: 
- dead organisms
 - river
 - hydrogen
 - floods
 - rain
 - H 2 O
 - weathering
 - h2o

Now knowing that some precipitation that falls on land may soak into the ground, becoming groundwater and rain is also known as precipitation, choose the best answer.


 

     rain    