Explain the terms give 2 examples of each
(i) macronutrients,
(ii) micronutrients,
(iii) toxic elements

Explanation

### Step-by-Step Solution:

1. **Definition of Macronutrients**:
- Macronutrients are essential nutrients that plants require in larger quantities for their growth and development. They play critical roles in various physiological processes.

**Examples**:
- **Sodium (Na)**: Important for osmotic balance and enzyme function.
- **Potassium (K)**: Vital for photosynthesis, enzyme activation, and maintaining cell turgor.
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