Answer:
I am the state when a person is holding a person inside
I open to close but I close to open. I'm surrounded by water but I'm never soaking. What am I?
What is easy to get into, but hard to get out of?
What comes once in a year twice in a week but never in a day?
I am the minerals vital for your good health.
A little house full of meat, no door to go in and eat.