Answer:
Mental illnesses are treated by wards, therapy,hospitals etc. all of them supposedly help with mental illnesses.
An abstract word are things like feelings, ideas, concepts and qualities
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.
