Question

which rule did you use to read the word returned? place it in the correct column.
compound word base word with prefix and suffix
returned

Explanation:

The word "returned" is formed by taking the base word "turn", adding the prefix "re-" (meaning again) and the suffix "-ed" (past tense marker). A compound word is made by joining two full independent words, which does not apply here.

Answer:

Compound Word: (empty)
Base Word with Prefix and Suffix: returned