Hi!
I would say C, weak, dead, or partial antigens because do you need to be introduced to the disease for your body to fight it.
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Answer:
Mouth, also called oral cavity or buccal cavity, in human anatomy, orifice through which food and air enter the body. the mouth opens to the outside at the lips and empties into the throat at the rear; its boundaries are defined by the lips, cheeks, hard and soft palates, and glottis.
Explanation:
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XYLEM AND PHLOEM.................
Here is your answer
D. Losing electrons
REASON:
Cations means positive ions.
Positive ions are formed by losing electrons which increase positive charge on the body.
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