In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".
I closed the window just in time and (return) to my room with relief.
Group Therapy is a form of psychotherapy in which one or more therapists treat a small group of patients to describe and discuss their problems. Group therapy allows individuals to develop self-awareness and better understand themselves by listening to others with similar issues in the context of their relationships.
An advantage to group therapy is that groups are source for social support.
An acid can be defined as a molecule or other species which can donate a proton or accept an electron pair in reactions.
(OR)
A substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind.