Explanation:

- To re-arrange the jumbled parts of the sentence, consider the logical sequence and flow.

- Start with identifying a likely subject or beginning. "I make at least three drafts of a song" (S) seems like an introductory action.

- This action (S) is likely motivated by a reason. "because I feel" (P) provides a reason for the action.

- "when you write something," (R) provides a condition related to the action and directly complements the reasoning.

- "you remember it better" (Q) concludes the sentence by explaining the benefit of the action taken.

Given this analysis, the correct sequence is SPRQ.