Primary Role of Antibodies

Let's work through this biology question about the immune system. We need to identify the primary role of antibodies from the given options.

Antibodies, also known as immunoglobulins, are Y-shaped proteins used by the immune system to identify and neutralize foreign objects like bacteria and viruses.

Let's evaluate the options. Option one suggests activating phagocytes. While antibodies can help phagocytes recognize targets, it is not their fundamental primary role.

Option two says antibodies destroy infected cells directly. This is actually the job of Cytotoxic T-cells or Natural Killer cells, not antibodies.