an immune molecule that connects to a specific antigen, triggering the immune response is a(n)\nlymphocyte.\n…

Brief Explanations:

Antibodies are immune - molecules that bind to specific antigens, initiating an immune response. Lymphocytes are cells, complement is a group of proteins involved in the immune response but not the molecule that directly binds to antigen, and mast cells are cells involved in allergic reactions and innate immunity.

Answer:

antibody