Verified Answer :

pandamille

Pneumonia
is usually caused by a bacterial or viral infection in the lung , which
causes the patient to cough up yellow-green mucus.

Answer:

Lungs.

Explanation:

Pneumonia is tissue inflammation in the longs, which is caused by a bacterial infection. When that happens, the system begin to make the person cough, as a reaction to expelled the external particles or organisms that are causing the problem.

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