The development of a sporophyte from the moss gametophyte without sexual fusion is called :

Options

A. apomixis
B. apogamy
C. apospory
D. amphimixis

Explanation

To solve the question "The development of a sporophyte from the moss gametophyte without sexual fusion is called:", we need to analyze the given options and understand the definitions of each term.

### Step-by-Step Solution:

1. **Understanding the Question**:
The question asks about the development of a sporophyte from a gametophyte without sexual fusion. This indicates that we are looking for a process that allows the sporophyte to form without the typical fertilization process.

2. **Analyzing the Options**:
- **A. Apomyxis**: This is a form of asexual reproduction where seeds are formed without fertilization. However, it typically refers to seed formation, which is not relevant to the development of a sporophyte from a gametophyte.

- **B. Apogamy**: This term refers to the development of a sporophyte directly from a gametophyte without the fusion of gametes. This matches the criteria of the question perfectly.

- **C. Apospory**: This is the formation of a gametophyte from a sporophyte without meiotic division. This is the reverse of what the question is asking, so it is not the correct answer.

- **D. Amphimixis**: This term refers to sexual reproduction involving the fusion of male and female gametes. Since the question specifies "without sexual fusion," this option is also incorrect.

3. **Identifying the Correct Answer**:
Based on the definitions and analysis, the correct answer is **B. Apogamy**, as it describes the development of a sporophyte from a gametophyte without sexual fusion.

### Final Answer:
The correct answer is **B. Apogamy**.

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