What is the main purpose of disinfectants?

The main purpose of disinfectants is to kill microorganisms. Disinfectants are chemical agents specifically formulated to destroy bacteria, viruses, and fungi on surfaces, thus reducing the risk of infection and contamination. They are commonly used in healthcare settings, homes, and various industries to maintain hygiene and prevent the spread of illness. The effectiveness of disinfectants is critical in controlling infectious diseases, as they help ensure that environments are safe and free from harmful pathogens.

On the other hand, the other options do not represent the purpose of disinfectants. Promoting bacterial growth is contrary to the intended use of disinfectants, as these agents aim to eliminate harmful microbes. Weakened immune response is not relevant to the function of disinfectants, which do not influence the body's immune system directly. Furthermore, enhancing microbial resistance also contradicts the objective of disinfectants, as these agents are designed to reduce rather than promote the survival of microorganisms.