A. Spirillum
B. Streptococcus
C. Vibrio
D. Coccus
🧠 Explanation:
Pneumonia, an inflammation of the lungs, is often caused by the bacteria Streptococcus pneumoniae. This infection affects air sacs, leading to symptoms like fever and difficulty breathing. Understanding its bacterial cause is key in medical science, guiding antibiotic treatments and prevention through vaccines. Studying Streptococcus highlights its role in public health, emphasizing the importance of early diagnosis and intervention in respiratory infections, a critical topic in medicine and health education for managing infectious diseases effectively.