What do T and B cells specifically target in the immune response?

T and B cells specifically target pathogens in the immune response because they play crucial roles in the adaptive immune system, which is tailored to recognize and respond to specific invaders such as bacteria, viruses, fungi, and parasites. T cells are involved in cell-mediated immunity, where they identify and destroy infected cells or help regulate other immune cells, while B cells are responsible for producing antibodies that specifically bind to antigens on the surface of pathogens. This targeted response is critical for effectively eliminating infections and providing long-term immunity through memory cells.

Other options focus on broader or less specific targets; for instance, all body cells encompass healthy and unhealthy cells, which are not the primary focus of T and B cell activity. Random antigens suggests a lack of specificity, which is contrary to how the immune system operates — it recognizes and targets specific antigens. Lastly, limiting the response to only bacterial infections overlooks the broader range of pathogens that T and B cells can effectively respond to, including viruses and other microorganisms.