Final answer:
The Fixer Compartment in an automatic processor is used for stabilizing the developed image on a film, which is critical to preserving the photograph after development.
Step-by-step explanation:
The Fixer Compartment in an automatic processor is a critical component in the film developing process. The primary role of the fixer is for stabilizing the developed image, which makes it the correct choice among the provided options. Choosing option 1, it works by removing any unexposed or undeveloped silver halide crystals from the film emulsion, securing the image and making it no longer sensitive to light. This process is crucial for ensuring that the pictures taken, whether with a basic camera with a simple lens and rotary shutter mechanism or with a modern digital camera using various scene modes and adjustable shutter speed and aperture, are preserved and can withstand the effects of light and other conditions over time.