Read the following passage and answer questions 

Nutrition is the process by which living organisms obtain and utilize food to sustain life. It is essential for growth, repair, and maintenance of the body. Nutrients are substances found in food that provide energy, build and repair tissues, and regulate bodily processes. They are classified into six major categories: carbohydrates, proteins, fats, vitamins, minerals, and water. Carbohydrates and fats are primarily energy sources, while proteins are crucial for growth and repair. Vitamins and minerals play vital roles in metabolic pathways and maintaining health. Water is essential for all life processes, including digestion, absorption, and excretion. A balanced diet containing all these nutrients in appropriate amounts is necessary for optimal health. Malnutrition, which includes undernutrition and overnutrition, can lead to various health problems. Hence, understanding and practicing good nutrition is fundamental for maintaining a healthy lifestyle.