Concept: The word “horizontal” has its primary stress on the third syllable.Explanation:The word is divided into syllables as: hor−i−ZON−tal.The stressed syllable is pronounced with greater emphasis.In “horizontal”, the third syllable ZON carries the main stress.Therefore, the correct stress pattern is hor-i-ZON-tal.Answer: A. hor-i-ZON-tal