Water is important for the functioning body as

Options

A. It releases energy
B. Provides `H^(+)` ions
C. Killed microorganisms
D. It is a very good solvent.

Answer

**Step-by-Step Solution:**

1. **Understanding the Importance of Water:**
- Water is a vital component of the human body, making up a significant portion of our total body weight. It plays several essential roles in maintaining bodily functions.

2. **Analyzing the Options:**
- The question provides four options regarding the importance of water:
1. It releases energy.
2. It provides H⁺ ions.
3. It kills microorganisms.
4. It is a very good solvent.

3. **Evaluating Each Option:**
- **Option 1: It releases energy.**
- Water itself does not release energy; rather, it is involved in metabolic processes where energy is released from nutrients.
- **Option 2: It provides H⁺ ions.**
- While water can dissociate into H⁺ and OH⁻ ions, its primary role in the body is not just to provide H⁺ ions.
- **Option 3: It kills microorganisms.**
- Water does not directly kill microorganisms; however, it can help in the process of washing them away or diluting them.
- **Option 4: It is a very good solvent.**
- Water is known as the "universal solvent" because it can dissolve a wide range of substances, including salts, sugars, acids, and gases. This property is crucial for various biochemical reactions and processes in the body.

4. **Conclusion:**
- Based on the evaluation of the options, the most accurate statement regarding the importance of water in the functioning of the body is that it is a very good solvent. Therefore, the correct answer is **Option 4**.