Which statements describe functions of antibodies? check all that apply. they maintain the cell’s shape. they regulate cell processes. they protect the body from infectious agents. they signal the immune system to destroy pathogens. they speed up biochemical reactions. they send electrical signals.

They protect the body from infectious agents.

They signal the immune system to destroy pathogens.

Explanation:

Antibodies are the specialized proteins which are produced in the body of the human or any other animal as an immune response. The production of these antibodies in the body are initiated by the entry of foreign antigens. These foreign antigens may belong to the infectious agents like pathogens. The numerous antibodies fight against the antigens of the disease causing agents and destroy them so as to reduce the chances of occurrence of infection and disease.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."