Final answer:
Complex carbohydrates, also known as polysaccharides, are long chains of sugar units. Examples include starch, glycogen, cellulose, and chitin.
Step-by-step explanation:
Complex carbohydrates, also called polysaccharides, are long chains of sugar units. They consist of hundreds or even thousands of monosaccharides bonded together in long chains. Examples of complex carbohydrates include starch, glycogen, cellulose, and chitin. These complex carbohydrates have different functions in living organisms, such as storing energy or making up certain structures.