Explanation:

- Each word in the code is represented by a number, a letter, and a symbol.

- The number indicates the length of the word.

- The letter corresponds to the first letter of the word shifted forward or backward in the alphabet.

- The symbol (@ or &) seems to follow a certain rule based on the text.

Let's break down each part:

- "beach material said entire" -> Lengths: 5, 8, 4, 6.

- Codes: 5W, 9O, 3S, 7V

- For the word "fluctuations":

- Length = 13

Analyzing your given options:

1. 11H& (Length doesn't match)

2. 13I@ (Not consistent with other codes)

3. 13I& (Not consistent with other codes)

4. 13H& ( Length: 13. Letter H is a possible shifted pattern)

5. 11H@ (Length doesn't match)

Correct answer is: 13H&