Question

even though t cells are mostly involved in cell - mediated immunity, they also important in humoral immunity, as t cells stimulate b cells to grow and divide rapidly into plasma cells and memory b cells.
_________________________ are the main weapon in humoral immunity

Explanation:

In humoral immunity, antibodies are produced by plasma cells and are the main agents that neutralize pathogens. Plasma cells are derived from B - cells which are stimulated by T - cells as described. Antibodies bind to antigens on pathogens, marking them for destruction or neutralizing their harmful effects.

Answer:

Antibodies