To solve the question of identifying the correct pair of a plant and its mode of nutrition/habitat, we will analyze each option provided.
### Step-by-Step Solution:
1. **Understand the Types of Plants and Their Nutrition Modes**:
- Different plants have different modes of nutrition, such as autotrophic (photosynthesis), heterotrophic (parasitic or insectivorous), and others based on their habitat (like aquatic or terrestrial).
2. **Analyze the First Option: Cuscuta**:
- Cuscuta is known as a total parasite or holoparasite. It does not perform photosynthesis and relies entirely on its host plant for nutrients, water, and shelter. This makes it a correct match for the mode of nutrition.
3. **Analyze the Second Option: Dystidia**:
- Dystidia, often referred to as the pitcher plant, is an insectivorous plant that traps insects for nutrients. However, the description provided states that it is not insectivorous, which contradicts its known characteristics. Therefore, this option is incorrect.
4. **Analyze the Third Option: Apuncia**:
- Apuncia is a type of cactus, which is a xerophyte. It does not consume other organisms but instead performs photosynthesis. The description of it being a predator is incorrect. Thus, this option is also incorrect.
5. **Analyze the Fourth Option: Capsula**:
- Capsula is described as a hydrophyte, but it is actually a mesophyte, which means it thrives in moderate moisture conditions. Therefore, this option is also incorrect.
6. **Conclusion**:
- After analyzing all options, the only correct pair is Cuscuta, which is a holoparasite. Therefore, the correct answer is option number one.
### Final Answer:
The correct pair of the plant and its mode of nutrition/habitat is **Cuscuta - Holoparasite**.
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