Concept:A sentence jumble requires arranging parts logically to form a coherent sequence.Explanation:Part P introduces the subject: "the element heats up". This is a natural starting point. Next, part R describes the appearance: "glowing like a dark orange". Part S adds what it radiates: "the visible range". Finally, part Q concludes with the result: "eventually reaching high temperatures". Thus, the correct order is P → R → S → Q.Answer:Option D (P R S Q)