One of these is an important function of vacuole

Options

A. Osmoregulation
B. Starch synthesis
C. Energy production
D. Digestion

Answer

### Step-by-Step Solution:

1. **Understanding Vacuoles**: Vacuoles are membrane-bound organelles found in cells, particularly in plant cells. They are essential for various cellular functions.

2. **Evaluating the Options**:
- **Option A: Osmoregulation**: This refers to the process by which cells maintain the balance of water and salts. Vacuoles play a crucial role in this by storing excess water and salts, thus helping to regulate osmotic pressure within the cell.
- **Option B: Starch Synthesis**: This is incorrect. Starch is synthesized in amyloplasts, not vacuoles.
- **Option C: Energy Production**: This is also incorrect. Energy production occurs in mitochondria, not vacuoles.
- **Option D: Digestion**: This is incorrect as well. Digestion in cells is primarily carried out by lysosomes.

3. **Conclusion**: Based on the evaluation of the options, the important function of the vacuole is **osmoregulation**. Therefore, the correct answer is **Option A**.