Final answer:
The humoral immune response is involved in the production of antibodies by B cells to defend against pathogens in the extracellular environment. Hence the correct answer is option A
Step-by-step explanation:
The humoral immune response, one of the two major components of the immune system, is involved in the production of antibodies by B cells. Antibodies are glycoproteins that bind to specific pathogens and toxins in the extracellular environment, aiding in the body's defense against them. This mechanism is referred to as humoral immunity, and it plays a crucial role in targeting and neutralizing pathogens outside of host cells.
Hence the correct answer is option A