Question

these are the precursors of a range of cells that are involved in the immune response. lymphocytes monocytes neutrophils lymphokines

Explanation:

Lymphocytes are white - blood cells crucial for immune response. Monocytes are phagocytic cells and can differentiate into macrophages and dendritic cells involved in immunity. Neutrophils are the most abundant white - blood cells and are key in the innate immune response against infections. Lymphokines are signaling molecules produced by lymphocytes, not cell precursors. Monocytes are precursors of macrophages and dendritic cells which participate in immune response.

Answer:

Monocytes