Which of the following is not an effect of acute scarcity of water on plants ?

Options

A. shortage of food
B. shortage of oxygen
C. shortage of carbon dioxide
D. shortage of rainfall

Answer

To determine which of the following is not an effect of acute scarcity of water on plants, we need to analyze the effects of water scarcity on plants. Here’s a step-by-step breakdown of the reasoning:

1. **Understanding Water Scarcity**: Water scarcity refers to a situation where there is not enough water available for plants to carry out their essential processes, such as photosynthesis.

2. **Effects of Water Scarcity**:
- **Food Production**: Water is crucial for photosynthesis, the process by which plants produce food (starch) and oxygen. Without sufficient water, plants cannot produce enough food.
- **Oxygen Production**: Since photosynthesis also produces oxygen, a lack of water will lead to a decrease in oxygen levels produced by plants.
- **Soil Fertility**: Acute water scarcity can lead to soil becoming infertile, affecting plant growth and health.

3. **Identifying the Odd One Out**: Now, we need to identify which option does not relate to the effects of water scarcity:
- **Shortage of Food**: This is a direct effect of water scarcity.
- **Shortage of Oxygen**: This is also a direct effect of water scarcity.
- **Shortage of Carbon Dioxide**: This is not directly related to water scarcity. Carbon dioxide is available in the atmosphere and is not affected by the amount of water in the soil.
- **Shortage of Rainfall**: This can lead to water scarcity, but it is not an effect on plants themselves.

4. **Conclusion**: The option that is not an effect of acute scarcity of water on plants is the **shortage of carbon dioxide**.

### Final Answer:
The option that is not an effect of acute scarcity of water on plants is **shortage of carbon dioxide**.