If I surround you, I can kill you-Riddle

Riddle 
Gogo and Kushal were at the shopping mall with Aalia and Sanjana. While the ladies shopped, Gogo asked Kushal, Always in you, sometimes on you; If I surround you, I can kill you. What am I?

    Water!

Mindyourlogic Riddle: Answer:
If I surround you, I can kill you-Riddle