Name the mineral element which is involved in the opening and closing of stomata and whose deficiency leads to yellow edges of leaves and their death

Explanation

**Step-by-Step Solution:**

1. **Identify the Function of the Mineral Element:**
- The mineral element in question is involved in the physiological process of opening and closing stomata in plants.

2. **Determine the Mineral Element:**
- The mineral element that plays a crucial role in this process is potassium (K). It is absorbed by plants in the form of potassium ions (K+).

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