The correct answer for the source of curcumin is option 2, turmeric. Curcumin is a chemical compound isolated from the plant turmeric, which is widely used as a spice and a natural remedy in various cultures. Turmeric, scientifically known as Curcuma longa, is a perennial plant belonging to the ginger family. It is primarily cultivated in India, Southeast Asia, and other tropical regions. The active component of turmeric is curcumin, which gives the spice its distinct yellow color and is known for its potential health benefits. Curcumin has been studied for its antioxidant, anti-inflammatory, and anticancer properties. While options 1, 3, and 4 are unrelated to the source of curcumin, turmeric is the correct option due to its abundant presence of curcumin.