A phreatophyte is

Options

A. Capparis
B. Euphorbia
C. Tamarix
D. Gnaphalium.

Answer

### Step-by-Step Solution:

1. **Definition of Phreatophyte**: A phreatophyte is a type of plant that has deep roots which allow it to access groundwater from the phreatic zone, also known as the zone of saturation.

2. **Characteristics of Phreatophytes**: These plants are adapted to obtain a significant portion of their water needs from underground sources. They often have roots that are in constant contact with moisture, allowing them to thrive in environments where surface water may be limited.

3. **Examples of Phreatophytes**: Common examples of phreatophytes include plants like alfalfa (Medicago sativa) and Tamarix. These plants are known for their ability to reach deep into the soil to access water.

4. **Conclusion**: Therefore, a phreatophyte can be defined as a deep-rooted plant that obtains water from the phreatic zone, and an example of such a plant is Tamarix.