In what part of the grain kernel is fiber located?

The bran is the correct answer because it is the outer layer of the grain kernel and is rich in dietary fiber and essential nutrients. This layer serves as protection for the kernel and is composed of several layers, which contain a high concentration of fiber, antioxidants, and B vitamins. Fiber is important for digestive health and can help in managing blood sugar levels, making the bran an essential component of whole grains.

The endosperm, while it does provide energy and is the primary part of the grain used in making refined flour, contains less fiber than the bran. The germ, which is the embryo of the seed, is rich in vitamins and healthy fats but has significantly less fiber than the bran. The term 'seed' generally refers to the entire grain kernel, which includes the bran, endosperm, and germ, and does not specifically identify the fiber's location. Thus, the bran is specifically recognized for its high fiber content within the grain structure.