What chemical neutralizes developer solution remaining in the wet solution?

The correct choice is Ammonia Thiosulfate, which is commonly used to neutralize the developer solution remaining in the wet solution. This chemical works effectively by stopping the development process which occurs in photographic processing. It does this by forming a complex that deactivates the developer, thereby preventing any further changes to the exposed photographic material. This is crucial since any residual developer can lead to unwanted darkening or fogging of the film, affecting the final image quality.

In processing films or photographs, it is essential to ensure that the developer is neutralized properly to maintain image fidelity and prevent ongoing development reactions that can alter the developed image. Other chemicals do serve important roles in photographic processing, but they do not effectively neutralize remaining developer solutions in the way Ammonia Thiosulfate does.