A. Emission
B. Excretion
C. Respiration
D. None of these
🧠 Explanation:
Excretion is the biological process of removing waste like carbon dioxide, urine, and sweat from the body. It maintains bodily balance and prevents toxin buildup. For biology students or health enthusiasts, understanding excretion is crucial for grasping how organs like the kidneys, lungs, and skin function, making it a fundamental topic in human physiology and health science education.