Ripe fruits soften due to

Options

A. Degradation of cell walls
B. Partial solubilisation fo pectic compounds
C. Metabolism of tannis
D. Exosmosis

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks why ripe fruits soften. This involves understanding the biochemical changes that occur in fruits during ripening.

2. **Identifying Key Components**: Ripe fruits contain pectin, which is a natural heteropolysaccharide found in the cell walls of plants, particularly in the skin of fruits.

3. **Process of Ripening**: During the ripening process, the pectin in the cell walls undergoes changes. Specifically, it is partially solubilized, which means that some of the pectin molecules break down and dissolve.

4. **Effect of Pectin Solubilization**: The partial solubilization of pectin leads to a decrease in the structural integrity of the cell walls, which results in the softening of the fruit.

5. **Evaluating Options**:
- **Option A: Degradation of cell wall** - This is not entirely correct as it does not specifically address the role of pectin.
- **Option B: Partial solubilization of pectin compounds** - This is correct as it directly relates to the softening process.
- **Option C: Metabolism of tannins** - This is incorrect as tannins are not primarily responsible for the softening of ripe fruits.
- **Option D: Exosmosis** - This is also incorrect as it does not play a significant role in the ripening process.

6. **Conclusion**: The correct answer is **B: Partial solubilization of pectin compounds**, as this process is responsible for the softening of ripe fruits.