B) Gleefully.
Jubilantly is a positive emotion, extreme happiness and excitement. Gleefully is also an accurate description of that. Thus, gleefully is the best answer.
Hope this helps!
Pretty sure it’s option #2, syllabic meter. If I get it wrong my bad!!
Are there answer choices?
If the question is in what sentence do you see a predicate adjective, then the correct answer is in the first one - Not all deserts are sweltering, where the word <em>sweltering </em>is a predicate adjective.
A predicate adjective is an adjective that can be found following a verb.
