Identify the respective phylum to which the following organisms belong. Give their characteristics.
Velvety green beds appearing on the wall in a shady moist place.

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism**: The description provided in the question refers to "velvety green beds appearing on the wall in a shady moist place." This suggests the presence of a type of plant that thrives in such environments.

2. **Determine the Phylum**: Based on the characteristics of the described organism, it can be identified as belonging to the phylum **Bryophyta** (commonly known as bryophytes).

3. **Characteristics of Bryophytes**:
- **Multicellular Plants**: Bryophytes are multicellular organisms.
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