Hi I am going to answer the questions I know. The water flows when there is big rocks and small hills too.Yes the water can freeze in the winter but only if it did not evaporate in the summer. Oh and yes sometimes in the summer the water will evaporate.You also forgot to ask if there are lights in underground caves. Oh and I will answer that for you too. No there are no lights in undergroud caves.  Well got to go now, bye.

Hi.  I wonder if you might know about underwater caves.

How does the water flow?  Where does the water go?  Is the water healthy ?  Can animals live in the underwater cave?  Can the water kill the fish? Can you drink the water? How much water is in the cave?  Will the water be safe to swim in?  Can the water freeze in the winter? Will it evaporate in the summer?

I am very interested in answers to these questions and would appreciate your help if you know about underwater caves.