Final answer:
A didactic poem aims to teach or instruct the reader. The LEAST likely suitable topic for this genre is romance.
Step-by-step explanation:
A didactic poem is a poem that aims to teach or instruct the reader. While all the given topics - science, philosophy, romance, and religion - can be the subject of didactic poems, the topic that is LEAST likely to be suitable is ROMANCE. Romance is more commonly associated with emotions, passion, and personal experiences, whereas didactic poems tend to focus more on moral or instructional themes.
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