Under what condition are `C_(4)` plants superior to `C_(3)`

Explanation

To understand under what conditions C4 plants are superior to C3 plants, we can break down the advantages of C4 plants into specific points:

### Step-by-Step Solution:

1. **Photosynthesis at Low CO2 Concentration:**
- C4 plants can efficiently perform photosynthesis even when the concentration of carbon dioxide (CO2) in the atmosphere is low. This is particularly advantageous in environments where CO2 levels fluctuate or are generally low.

2. **Water Efficiency:**
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