Final answer:
The immune response is the body's defense mechanism against pathogens, and one example is the flushing action of tears as part of the innate immune response to protect the eyes from pathogens.
Step-by-step explanation:
The immune response is the body's defense mechanism against pathogens. One example of the immune response is the flushing action of tears. Tears contain microbicidal factors that help prevent infection by rinsing away pathogens from the eyes and surrounding areas. This is a part of the body's innate immune response, which is the non-specific defense system that is always active to provide immediate protection against pathogens.