An immune reaction to the protein gluten is the cause ofMultiple Choicecardiovascular disease.celiac disease.diabetes.osteoporosis.

The immune reaction to the protein gluten specifically causes celiac disease. Celiac disease is an autoimmune disorder where the ingestion of gluten—a protein found in wheat, barley, and rye—leads to damage in the small intestine. In genetically predisposed individuals, the consumption of gluten triggers an immune response that results in inflammation and villous atrophy. This impairment can cause a range of symptoms, including gastrointestinal issues, nutritional deficiencies, and various other health problems. While there might be associations of celiac disease with other conditions such as osteoporosis or diabetes, the direct immune response to gluten is indicative of celiac disease specifically, rather than cardiovascular disease or the other options provided.

Final Answer

Celiac disease is the correct answer.