(A)  A dutch door is essentially two horizontal door halves, with the top and bottom halves operating independently from each other. You can close the bottom for some privacy, while leaving the top open, allowing fresh air into the room and enabling you to have a conversation with someone on the other side of the door. Dutch doors also make a great baby gate, and can be used for a nursery or play room door. When the top and bottom are locked
together, the two sections work as one, like a standard door. The dutch door originated in the Netherlands in the early 1600’s.