Final answer:
Lupus (autoimmune disease) is the condition where the body's immune system attacks healthy cells, unlike other options which relate to abnormal cell growth, inherited disorders, or organ-specific diseases.
Step-by-step explanation:
Among the options provided, the disease caused by the body's immune system attacking healthy cells is lupus (autoimmune disease). Autoimmune diseases occur when the immune system, which is meant to defend the body against diseases, mistakenly attacks healthy cells. Diseases like type 1 diabetes, multiple sclerosis, and rheumatoid arthritis are other examples where the immune system targets the body's own tissues. In lupus, otherwise known as systemic lupus erythematosus (SLE), the immune system can attack various organs and tissues throughout the body, leading to a diverse set of symptoms and complications.
Unlike diseases such as cancer, which involve abnormal cell growth, or sickle cell disease, an inherited blood disorder, autoimmune diseases like lupus arise from an abnormal immune response. While autoimmune diseases cannot be cured, their symptoms can often be managed using immunosuppressive drugs to reduce the immune system's erroneous attacks on normal cells.