Final answer:
The T-shaped profile molding attached to one of the French doors is known as a Door Stop. It ensures that the doors close properly and stay aligned.
Step-by-step explanation:
A doorstop (also door stopper, door stop or door wedge) is an object or device used to hold a door open or closed, or to prevent a door from opening too widely. The term for the molding with a T-shaped profile that is attached to the edge of one of the French doors to act as a stop for the other door is known as a Door Stop.
This piece serves as a barrier or point of contact for the other door, ensuring the doors close properly and stay aligned. It is not referred to as T-Profile Molding, French Door Trim, or Molding Closure in this context. The molding is instrumental in the function and aesthetic of the French doors, contributing to both the protection of the doors and the seamless appearance when they are closed.