Answer: (C) Insects and fungi
Explanation: Chitin is a strong and flexible polysaccharide that forms the exoskeleton of insects and the cell walls of fungi. It provides structural support in these organisms.

Answer: (B) Building muscle
Explanation: Carbohydrates primarily provide energy, spare protein from being used for energy, and help in fat metabolism. However, building muscle is primarily the role of proteins, not carbohydrates.

Answer: (A) Glucose
Explanation: Glucose is the primary source of short-term energy in humans as it is quickly metabolized to produce energy through cellular respiration. Other carbohydrates like starch and glycogen serve as energy reserves, but glucose is directly used for immediate energy needs.

Answer: (B) Proteins
Explanation: Carbohydrates are the body’s preferred source of energy. When carbohydrates are available, they prevent the breakdown of proteins for energy, allowing proteins to perform their primary functions, such as tissue repair and enzyme production.

Answer: (D) Sugary drinks
Explanation: Sugary drinks are high in simple carbohydrates, primarily in the form of added sugars like glucose and fructose, which are easily absorbed and provide quick energy.

Answer: (C) Starch
Explanation: Starch is a complex carbohydrate that serves as the main form of stored energy in plants. It is abundant in foods like bread, pasta, and potatoes, which are commonly consumed as energy sources.

Answer: (B) Green leafy vegetables
Explanation: Green leafy vegetables are rich in dietary fiber, which aids digestion and helps maintain bowel health. Other options like white rice, sugary cereals, and soft drinks lack significant fiber content.

Answer: (C) Milk
Explanation: Lactose is a sugar primarily found in milk and other dairy products. It is also known as milk sugar and is broken down in the body by the enzyme lactase.

Answer: (A) Red meat
Explanation: Glycogen is stored primarily in the muscles and liver of animals. Red meat, being animal-based, contains glycogen, whereas plant-based foods like apples, wheat, and oatmeal do not.