Answer:
see below
Step-by-step explanation:
The author uses text structure effectively in this passage to fulfill the purpose of portraying the mystery as an intellectual game. The passage describes a game of puzzles played on a map, with one party requiring another to find a given word. The adept selects such words as stretch in large characters from one end of the chart to the other, which escape observation by being excessively obvious. This is a point that is somewhat above or beneath the understanding of the Prefect, who never once thought it probable or possible that the Minister had deposited the letter immediately beneath the nose of the whole world. The author uses the game of puzzles as a metaphor for the mystery, highlighting the intellectual challenge of solving the case and the need to look beyond the obvious in order to find the solution. The text structure effectively reinforces the idea that the mystery is a puzzle to be solved and that the solution requires intellectual effort and ingenuity.