Coconut : Shell :: Letter : ?

Options

A. Letter-box
B. Stamp
C. Mail
D. Envelope

Explanation

To solve the analogy "Coconut : Shell :: Letter : ?", we need to identify the relationship between the first pair of words and then apply that relationship to the second pair.

### Step-by-Step Solution:

1. **Identify the Relationship in the First Pair**:
- The first pair is "Coconut : Shell".
- A coconut is a fruit that is enclosed in a shell. The shell protects the coconut.

2. **Apply the Same Relationship to the Second Pair**:
- The second pair is "Letter : ?".
- We need to find something that encloses or protects a letter in the same way that a shell encloses a coconut.

3. **Consider Possible Options**:
- We can think of various items that might enclose a letter:
- A letterbox (not correct, as it is not an enclosure).
- A stem (not correct, as it does not relate to letters).
- Mail (not correct, as it is a broader category).
- An envelope (correct, as it is specifically designed to enclose a letter).

4. **Conclusion**:
- Since an envelope encloses a letter just as a shell encloses a coconut, the answer to the analogy is "Envelope".

### Final Answer:
Letter : Envelope