This picture illustrates the dog’s determination to get in the closet, to the point that she somehow managed to tear off her shirt on the door hardware.
I have always assumed that she is interested in the closet for the trash can, which she normally knocks over, removes the contents, and relocates them around the house.
But as you can see, in this case the trash can is outside the closet as well as empty. Rice and canned goods are also stored in this closet. I suppose tearing open a bag of rice and dragging it all over the house might be equally exciting. Or perhaps she is just a creature of habit. We may never know.