Answer:1. Energy Production,2. Growth and Repair,3. Maintenance of Body
Explanation:food: 1. Energy Production: Animals convert the chemical energy stored in food into a form that can be used by their cells. During digestion, carbohydrates, proteins, and fats are broken down into smaller molecules like glucose. Glucose is then transported to cells where it undergoes cellular respiration to produce ATP (adenosine triphosphate), the energy currency of cells. This energy is used for essential processes such as growth, movement, and maintenance of body temperature. For example, a cheetah uses the energy from the food it consumes to fuel its high-speed chases in pursuit of prey. 2. Growth and Repair: Animals use food to support the growth and development of their bodies. Proteins from the food they consume are broken down into amino acids, which are then used to build and repair tissues, such as muscles, organs, and skin. These amino acids are also crucial for the production of enzymes, hormones, and antibodies that regulate body functions and protect against infections. For instance, a growing puppy requires food to provide the necessary nutrients for its bones, muscles, and organs to develop properly. 3. Maintenance of Body Functions: Animals need food to maintain the normal functioning of their bodies. Essential nutrients, such as vitamins, minerals, and fatty acids, obtained from food are used for various bodily functions. For example, calcium is necessary for bone health, iron is needed for oxygen transport in the blood, and vitamin C is important for the immune system. As an example, a bird needs food to obtain calcium for eggshell formation, which is vital for successful reproduction. In summary, animals use food to obtain energy, support growth and repair, and maintain their body functions.