What describes the inflammation caused by sinusitis?

Sinusitis specifically refers to the inflammation of the sinuses, which are the air-filled cavities located around the nasal passages. When these cavities become inflamed, typically due to infection, allergies, or other irritants, it can lead to symptoms such as facial pain, nasal congestion, and difficulty breathing through the nose. This condition can occur as a result of a viral or bacterial infection, or even following a cold. The other options describe inflammation in different areas of the respiratory system, which are not relevant to sinusitis: the lungs relate to conditions like pneumonia, the throat pertains to pharyngitis or tonsillitis, and the nasal passages, while involved in sinusitis, are not the primary focus of the condition's definition. Thus, the correct answer accurately identifies the specific location and nature of the inflammation associated with sinusitis.