A balanced diet consists of all the necessary components in a balanced form. These components include proteins, fruits, and fats, among others. Option 'D', which states that a balanced diet consists of all the components in a balanced form, is the correct answer.

Protein:
Protein is an essential component of a balanced diet. It plays a crucial role in repairing and building tissues, as well as in the production of enzymes, hormones, and antibodies. Good sources of protein include lean meats, poultry, fish, eggs, dairy products, legumes, and nuts. Including protein in a balanced diet helps in maintaining and repairing the body's tissues and structures.

Fruits:
Fruits are rich in essential vitamins, minerals, and dietary fiber. They provide numerous health benefits, including boosting the immune system, improving digestion, and reducing the risk of chronic diseases. Fruits are also a good source of antioxidants, which help in fighting against free radicals and oxidative stress. Consuming a variety of fruits ensures that the body receives a wide range of nutrients necessary for proper functioning.

Fats:
Fats are an important component of a balanced diet, but it is important to choose healthy fats rather than unhealthy ones. Healthy fats, such as monounsaturated and polyunsaturated fats, provide energy, support cell growth, protect organs, and help in the absorption of fat-soluble vitamins. Sources of healthy fats include avocados, nuts, seeds, olive oil, and fatty fish like salmon. On the other hand, unhealthy fats, such as saturated fats and trans fats, should be limited as they can increase the risk of heart disease and other health problems.

All the components in balanced form:
A balanced diet ensures that all the necessary nutrients are consumed in appropriate proportions. It includes carbohydrates, proteins, fats, vitamins, minerals, and water. Each nutrient has its own role in maintaining overall health and well-being. Consuming a balanced diet provides the body with the required energy, supports growth and development, and helps in preventing various diseases. It is important to have a variety of foods from different food groups to ensure a balanced intake of nutrients.

In conclusion, a balanced diet consists of all the necessary components, including proteins, fruits, fats, and others, in a balanced form. It is important to include a variety of foods from different food groups to ensure that all the required nutrients are consumed in appropriate proportions.