Final answer:
The part of the immune response process that is not involved is the replication of antigens; all other options listed such as antibody production, direct attack of pathogens, and formation of memory cells are essential functions within the lymphatic system's role in immunity.
Step-by-step explanation:
The immune response mainly involves the lymphatic system, which produces various types of lymphocytes that help defend the body against pathogens. When presented with the choices regarding the immune response process, the option that is not part of the process is C) Replication of antigens. This is because antigens are the foreign or abnormal substances that immune cells respond to, but they are not replicated by the immune system. The other options, such as A) Production of antibodies, B) Direct attack and destruction of foreign or abnormal agents, and D) Formation of memory cells are indeed parts of the immune response. Antibodies are produced by B cells, direct attack is performed by T cells, and memory cells are formed to ensure a quicker response upon subsequent exposures to the same pathogen.