Put the jumbled words in the correct order to form a meaningful sentence.…

Concept: A jumbled-word sentence question is solved by applying standard English word order — subject, then the main verb, then the verb's complement (e.g. an infinitive phrase stating what the verb takes) placed immediately after it, with adverbial phrases (time, place, manner) attached at the end. A modifying phrase should sit next to the element it is meant to describe. Among orderings that are individually grammatical, the accepted "meaningful sentence" is the single arrangement that gives exactly ONE clear reading with standard word order; an ordering that leaves a modifier's attachment unclear, or splits a verb from its complement, is not accepted even when it can still be parsed.

Application: The words to place are: he, promised, to, visit, his, aunt, on, his, way, home. Following Subject + Verb + Complement + Adverbial order: the subject "He" is followed directly by the verb "promised" and its infinitive complement "to visit his aunt" (stating WHAT he promised), and the adverbial phrase "on his way home" is placed right after "to visit his aunt", attaching unambiguously to the visit. This uses every word exactly once and gives a single, clear meaning with no competing reading.

Cross-check: Each remaining arrangement breaks this order in a different way:

• "He promised on his way home to visit his aunt." places "on his way home" right after "promised" rather than next to "to visit", so the phrase can attach to either the promising or the visit — the ordering admits two readings instead of one.

• "On his way to his aunt, he promised visit home." drops the infinitive marker before "visit" ("promised visit" is not grammatical) and wrongly folds "aunt" into the phrase about his way, leaving "home" stranded.

• "To visit his aunt, he promised on his way home." fronts the infinitive phrase as if separate from "promised", so the sentence never states what was promised — the verb is left without its complement.

Only the arrangement that keeps "promised" directly followed by "to visit his aunt", with "on his way home" attaching unambiguously at the end, gives exactly one clear reading — which is why it is the accepted answer.