Final answer:
Natural Killer (NK) cells act in the innate immune response and originate from the common lymphoid progenitor (CLP). T cells, B cells, and plasma cells are part of the adaptive immune response.
Step-by-step explanation:
The CLP (common lymphoid progenitor) gives rise to different types of lymphocytes in the immune system. Among the descendants of the CLP, the one that acts in the innate immune response specifically is the Natural Killer (NK) cell. NK cells are part of the body's first lines of defense against viruses and certain types of cancer as they can recognize and kill cells that express foreign or abnormal markers. On the other hand, T cells and B cells, which include plasma cells, are part of the adaptive immune system, which is a specific immune response that is slower and requires information from the innate immune system to function.