The correct answer is "Scarring."
The three lines of defense your body has against disease typically include:
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Physical and Chemical Defenses: This includes barriers like skin and mucous membranes, as well as chemical defenses such as enzymes and antimicrobial substances.
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Inflammation: This is a response to injury or infection that helps to isolate and eliminate pathogens, involving various immune cells and signaling molecules.
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Immune System: This is the body's adaptive defense mechanism that involves specialized cells and processes to identify and eliminate pathogens.
Scarring is a result of the healing process after tissue damage and is not considered a line of defense against disease.