The answer to this question is (d) water.

Explanation:

Water is the most abundant substance in our body, making up about 60-70% of our total body weight. It is essential for various bodily functions and plays a crucial role in maintaining overall health. Here is a detailed explanation of why water forms most of our body weight:

Importance of Water:
- Water is a vital component of cells, tissues, and organs in our body.
- It helps in regulating body temperature, keeping us cool through perspiration.
- Water acts as a lubricant for joints and helps in cushioning organs and tissues.
- It aids in digestion and absorption of nutrients in the body.
- Water is essential for transporting nutrients, oxygen, and waste products throughout the body.

Protein, Fat, and Carbohydrates:
While proteins, fats, and carbohydrates are important nutrients for our body, they do not form the majority of our body weight. Here's a brief explanation of each:

Proteins:
- Proteins are essential for growth, repair, and maintenance of tissues in our body.
- They are made up of amino acids and play a crucial role in various bodily functions, including enzyme production, hormone regulation, and immune system function.
- Proteins contribute to about 16% of our total body weight.

Fats:
- Fats are a concentrated source of energy in our body.
- They provide insulation and protection to organs.
- Fats are essential for the absorption of fat-soluble vitamins.
- Fats contribute to about 15-20% of our total body weight.

Carbohydrates:
- Carbohydrates are the primary source of energy for our body.
- They are broken down into glucose, which is used by cells for energy production.
- Carbohydrates contribute to about 1-2% of our total body weight.

In conclusion, while proteins, fats, and carbohydrates are important for our body's functioning, water forms the majority of our body weight. It is crucial to stay hydrated and consume an adequate amount of water to maintain overall health and well-being.

Fat forms most of the weight of our body