Concept:Stress pattern refers to which syllable in a word is pronounced with more emphasis.Explanation:The word "believe" has stress on the second syllable: be-LIEVE.The word "declare" has stress on the second syllable: de-CLARE.The word "annoy" has stress on the second syllable: a-NNOY.The word "radar" has stress on the first syllable: RA-dar.Since "radar" is the only word with stress on the first syllable, it has a different stress pattern.Answer:B. radar