Quran 21:30 – Creation Of Living Things From Water
Audience of that time was well aware of the fact that water was an essential ingredient for human survival and for survival of other cretures as well. The falling of rain, the growing of crops becuase of that rain and then water itself for drinking; infact our whole lives revolve around water and so were theirs. Just the way we know how much important water is for us to even be alive and for creatures around us, they knew the same. There are no scientific connotations here, a simple argumnt for every human being based on our daily observations.