The answer is organelle.
Organelles are specialized structures within cells that perform distinct processes necessary for the cell’s survival and functionality. Each organelle has a specific role, such as energy production, protein synthesis, and waste processing. For example, mitochondria are known as the powerhouses of the cell because they generate ATP, the energy currency of the cell. Other organelles include the nucleus, which houses genetic material, and ribosomes, which are essential for protein synthesis. Understanding organelles is crucial for studying cell biology and the overall functioning of living organisms.