Horizontal stabilizers are essential components of an aircraft's tail structure. They are located at the rear of the plane and help maintain stability during flight by preventing unwanted pitch movements. This means they help keep the nose of the aircraft from rising too high or dipping too low. These stabilizers work in conjunction with the elevator, a movable part attached to the horizontal stabilizer. When the pilot adjusts the elevator, it changes the airflow around the stabilizer, allowing the aircraft to climb or descend smoothly. Together, they ensure a balanced and controlled flight experience.