Apoptosis is a form of programmed cell death that plays a crucial role in development and homeostasis within multicellular organisms. It enables the body to eliminate damaged, unwanted, or potentially dangerous cells in a controlled manner. This process is distinct from necrosis, which results from injury and leads to inflammation. By using a series of biochemical events, apoptosis ensures that cellular components are dismantled and recycled efficiently, thus promoting the overall health of the organism and preventing diseases such as cancer.