Water is often the limiting factor for plant growth and productivity in both (A)____and (B)_____

Answer

**Step-by-Step Solution:**

1. **Understanding the Role of Water in Plant Growth:**
- Water is essential for plant growth and development. It is involved in various physiological processes, including photosynthesis, where plants convert light energy into chemical energy to produce food.

2. **Identifying Water Loss Mechanism:**
- Plants absorb water through their roots, but a significant amount of this water is lost through a process called transpiration. Transpiration is the evaporation of water from the plant's surface, primarily through small openings called stomata.

3. **Recognizing the Impact of Transpiration:**
- The loss of water through transpiration can limit the amount of water available for metabolic processes. This limitation can affect plant growth and productivity.

4. **Applying the Concept to Different Environments:**
- The limiting effect of water due to transpiration is observed in various settings. In agriculture, insufficient water can lead to reduced crop yields. Similarly, in natural environments, plants may struggle to thrive if water is scarce.

5. **Filling in the Blanks:**
- Based on the understanding that water is a limiting factor in both agricultural and natural settings, we can conclude that:
- (A) Agricultural
- (B) Natural environment

**Final Answer:**
Water is often the limiting factor for plant growth and productivity in both (A) Agricultural and (B) Natural environment.

---