Which cellular organelle is primarily responsible for the degradation of worn-out organelles and foreign particles taken up by phagocytosis?

✓ Correct Answer: Option D

Lysosomes are membrane-bound organelles containing hydrolytic enzymes that break down cellular waste products, worn-out organelles, and foreign invaders (like bacteria) taken into the cell via phagocytosis, playing a crucial role in cellular recycling and defense.