Final answer:
The replenisher pump is used for dispensing chemicals into the processing compartments of the automatic processor, ensuring optimal film development.
Step-by-step explanation:
The replenisher pump is used for Option 1: Dispensing chemicals into the processing compartments of the automatic processor. It plays a crucial role in the development and maintenance of the appropriate chemical balance within the processor, ensuring optimal processing of the film. By dispensing the necessary chemicals, such as developer and fixer, into the processing compartments, the replenisher pump helps to achieve consistent and high-quality film development.