Concept:Arrange sentence parts logically to form a coherent paragraph about Ravi's new geometry box.
Explanation:First, after opening the box, we describe its contents: "It had a ruler, compass, and protractor" (P).
Next, Ravi shows it to his friends (R).
Then, he uses it in his maths class (Q).
Finally, before the closing sentence, the box's appearance is described: "It was made of metal and looked shiny" (S).
This order PRQS makes the paragraph flow naturally.
Answer:The correct sequence is PRQS, which corresponds to option C.