How are the three lines of defense the same? They all involve producing fever.
They all involve fighting pathogens.
They all involve swelling of the affected area.
O They all involve the production of antibodies.

They all involve fighting pathogens.

Explanation:

The first line are the surface areas that prevent the pathogen from entering the body.

The 2nd line are the non-specific phagocytes and other internal mechanisms that comprise innate immunity

The final line of defence against infection are the lymphocytes that produce antibodies to specific antigenic fragments

They all involve fighting pathogens.

Explanation:

i did warm up on edge