False. A threat is a possible danger. Vulnerability is a weakness.
Answer:
If a splinter of wood enters the skin and introduces microorganisms to the site the body would first release chemical mediators like histamine then cause vasoconstriction. Platelets work to make a blood clot then neutrophils come in and vacillation occurs. This causes redness, warmth, swelling and pain. Edema and pus formation occurs therefore the neutrophils work to rid the area of cell debris and pathogens. Later the lymphocytes and macrophages will finish the job of the neutrophils and scar tissue is formed to repair the damaged tissue.
Explanation:
This is an example of <em><u>natural selection</u></em> in action.
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I think it is (b) i have studied this before. ( =
I’m not a hundred percent sure but it might be B