A sequence of defense for fighting off a pathogen is tears → fever → antibodies.
What are the 3 lines of defense against a pathogen?
The human body has three preceding lines of defense to fight against unfamiliar invaders, also viruses, bacteria, and fungi.
The immune system's three lines of defence include physical and chemical barriers, non-specific innate, and distinct adaptive reaction.
Thus, option "A" is correct, tears → fever → antibodies.
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