Which of the following is a correct pair:

Options

A. Cuscuta - parasite
B. Dischidia - insectivorous
C. Opuntia - predator
D. Capsella - hydrophyte

Answer

To solve the question "Which of the following is a correct pair?", we will analyze each option provided and determine whether the pair is correct or incorrect.

### Step-by-Step Solution:

1. **Identify the first option: Cascata - Parasite**
- Cascata is known to be a total shoot parasite of many plants. This means it derives its nutrients from its host plants, which is characteristic of a parasite.
- **Conclusion**: This pair is correct.

2. **Identify the second option: Dyskidia - Insectivorous**
- Dyskidia is not known for being insectivorous. Instead, it is a genus of plants that are often epiphytic and do not primarily consume insects for nutrients.
- **Conclusion**: This pair is incorrect.

3. **Identify the third option: Aponchia - Predator**
- Aponchia refers to a type of cactus. Cacti do not exhibit predatory behavior; they are primarily photosynthetic and do not consume other organisms as predators do.
- **Conclusion**: This pair is incorrect.

4. **Identify the fourth option: Capsella - Herbaceous**
- Capsella is a genus of flowering plants, commonly known as shepherd's purse. While it is herbaceous, it does not grow in water but rather in terrestrial environments. However, the term "herbaceous" is not incorrect in this context.
- **Conclusion**: This pair is also incorrect in the context of the question.

### Final Answer:
The only correct pair is **Cascata - Parasite**.