1 door closes, 9 open. When 9 close, 1 door opens. What is it?

Question

1 door closes, 9 open. When 9 close, 1 door opens. What is it?

Answer 1

Idk

Answer 2

y they b synchronized?

Answer 3

a d**n

there are 10 doors or chambers if you would. when the water level is at a certain point the one door opens and the other 9 close. this is to regulate the amount of water to make sure you don't overflow. when the water level gets too high then the one door closes and the other 9 open to get rid of more water. then when the level drops down to the desired level the 9 doors close and the one reopens.  

Answer 4

...Opportunity? I have no idea tbh.  

Answer 5

"What is it? An enclosure with ten doors; when one is open, nine are shut, and when nine are open, one is shut," Sheba asked Solomon.

Solomon answered, "The enclosure is the womb, and the ten doors are the ten orifices of man, namely his eyes, his ears, his nostrils, his mouth, the apertures for discharge of excreta and urine, and the navel. When the child is still in its mother's womb, the navel is open, but all the other apertures are shut, but when the child issues from the womb the navel is closed and the other orifices are open."

Answer 6

one closes at 1:00am

and it opens at 9:00am

9:00 pm it closes

1:00 pm it opens

Answer 7

Is it life and death?

Infancy, Toddler, Child, Teen, Young Adult, Adult, Middle Aged, Old and Death.

First door being 'infancy' which opens up the remaining 9 doors of life.

When you die, you open up the last door 'death' and it closes the others behind.

Answer 8

automatic