What is consequence of efflux of `K^(+)` ions?

Explanation

### Step-by-Step Solution

1. **Understanding Potassium Ion Efflux**:
- The efflux of potassium ions (K⁺) refers to the movement of potassium ions out of the guard cells. This process is crucial for the regulation of stomatal opening and closing.

2. **Role of Guard Cells**:
- Stomata are surrounded by guard cells, which are specialized cells that control the size of the stomatal pore. The turgidity (swelling due to water) of these guard cells determines whether the stomata are open or closed.

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