The sporophyte of Funaria begins development within

Options

A. antheridium
B. archegonium
C. capsule
D. protonema

Answer

To solve the question "The sporophyte of Funaria begins development within," we will analyze the options provided and understand the life cycle of Funaria, a type of moss.

### Step-by-Step Solution:

1. **Understanding Funaria**: Funaria is a moss that belongs to the group of plants known as bryophytes. In bryophytes, there are two main phases in their life cycle: the gametophyte and the sporophyte.

2. **Identifying the Structures**:
- **Antheridium**: This is the male reproductive structure that produces sperm (antherozoids).
- **Archegonium**: This is the female reproductive structure that produces eggs.
- **Capsule**: This is the part of the sporophyte where spores are produced.
- **Protonema**: This is the filamentous structure that develops from the spore and is part of the gametophyte stage.

3. **Sporophyte Development**: The sporophyte is a diploid structure that develops from the fertilization of the egg by the sperm. In bryophytes, the sporophyte is dependent on the gametophyte for nutrition.

4. **Where Does Development Start?**: The development of the sporophyte in Funaria begins within the archegonium. After fertilization, the zygote (formed from the fusion of sperm and egg) develops into the sporophyte while still within the archegonium.

5. **Conclusion**: Based on the understanding of the structures and their functions, the correct answer to the question is that the sporophyte of Funaria begins development within the **archegonium**.

### Final Answer:
The sporophyte of Funaria begins development within the **archegonium**.

---