Why is `C_(4)` cycle seen more in some tropical plants?

Explanation

### Step-by-Step Solution

1. **Understanding the C4 Cycle**: The C4 cycle is a photosynthetic pathway that is particularly efficient in certain plants, especially those in warm climates. It is named for the four-carbon compound (oxaloacetate) that is formed during the initial steps of carbon fixation.

2. **Environmental Conditions**: C4 plants are commonly found in tropical regions because these areas often have high temperatures and intense sunlight. These conditions can lead to increased rates of photorespiration in C3 plants, which can be detrimental to their photosynthetic efficiency.

3. **Photorespiration in C3 Plants**: In C3 plants, the enzyme Rubisco can fix oxygen instead of carbon dioxide under high temperatures, leading to photorespiration. This process wastes energy and reduces the overall efficiency of photosynthesis.

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