Concept:Identify which word stresses a different syllable compared to the others.Explanation:The word "penitent" is pronounced with stress on the first syllable: PEN-i-tent.The word "penitence" also stresses the first syllable: PEN-i-tence.The word "retrospect" stresses the first syllable: RET-ro-spect.However, "discover" stresses the second syllable: dis-COV-er.Since the stress pattern of "discover" differs from the rest, it is the odd one out.Answer:D. discover