The correct answer is option 4, Root. The chicory powder that is mixed with coffee powder is obtained from the root of the chicory plant. The chicory plant is a perennial herbaceous plant that belongs to the dandelion family. The roots of the chicory plant are roasted and ground to produce chicory powder, which is often used as a coffee substitute or as an additive to enhance the flavor of coffee. The root of the chicory plant has a woody texture and is known for its slightly bitter taste. By blending chicory powder with coffee powder, it helps to reduce the caffeine content and provides a unique flavor to the coffee. Therefore, option 4, Root, is the correct answer.