select the odd one w.r.t. the type of moss which has great water holding capacity.

Options

A. Bog moss
B. Peat moss
C. Cotton moss
D. Irish moss

Answer

To solve the question regarding the type of moss with great water holding capacity, we need to identify the types of moss and determine which one is the odd one out based on its water retention ability.

### Step-by-Step Solution:

1. **Understand the Types of Moss**:
- Mosses can be categorized into various types based on their habitat and characteristics. Common types include Sphagnum moss, Polytrichum moss, and Bryum moss.

2. **Identify Water Holding Capacity**:
- Sphagnum moss is known for its exceptional water retention capabilities. It can absorb and hold large quantities of water, making it a key component in peat bogs.
- Polytrichum moss also has good water retention but not as much as Sphagnum.
- Bryum moss typically has a lower water holding capacity compared to the other two.

3. **Determine the Odd One Out**:
- Since Sphagnum moss is recognized for its great water holding capacity, and both Polytrichum and Bryum moss have lesser capacities, we can conclude that Bryum moss is the odd one out.

4. **Final Answer**:
- The odd one out with respect to the type of moss which has great water holding capacity is **Bryum moss**.