For the question, choose the most appropriate stress pattern from the options. The stressed syllables are written in capital letters.
convalescent
Answer Details
The word convalescent has four syllables: con-va-LES-cent. The primary stress falls on the third syllable: /ˌkɒnvəˈlesənt/.
This word derives from the Latin convalescere ("to grow strong"). In English, the stress pattern places the primary accent on "-LES-," which is the syllable that is spoken most prominently. The first syllable "con-" carries a secondary (weaker) stress, while "-va-" and "-cent" are unstressed.
Stressing the first syllable (CONvalescent), the second (conVAlescent), or the fourth (convaleSCENT) would produce incorrect pronunciations that do not match standard English usage.