Final answer:
The technique mentioned is known as silver staining where silver ions are reduced to their visible metallic form for microscopic visualization of biological specimens. Option C.
Step-by-step explanation:
The process described in the question involves silver staining, a technique used in microscopy to visualize cells and cellular components.
During silver staining, silver ions (Ag+) are reduced to their metallic form (Ag) by a reducing agent. This can be seen when copper wire is placed in a solution with dissolved silver salt; the silver ions are reduced on the surface of the copper, while the copper ions turn the solution blue.
The reduced silver metal precipitates, and under the microscope, it enhances the contrast of the structures that have absorbed the silver. Silver staining is one of several staining methods used alongside immunocytochemistry (ICC) and various staining techniques to distinguish and study different components within biological specimens. Option C.