Concept:Stress pattern refers to the syllable that receives the main emphasis when a word is spoken.Explanation:The word "prevalent" has stress on the first syllable: PRE-va-lent.The word "convalesce" has stress on the last syllable: con-va-LESCE.The word "circumstance" has stress on the first syllable: CIR-cum-stance.The word "relegate" has stress on the first syllable: REL-e-gate.Words A, C, and D all follow the same first-syllable stress pattern.Only word B differs from the group.Answer:B. convalesce