To identify a selection that alludes to the central idea that anti-LGBTQ laws can cause psychological stress, look for phrases or sentences that discuss the emotional or mental health impacts of discrimination, legal restrictions, or societal rejection faced by LGBTQ individuals.
For example, a selection that states something like, "Research shows that individuals subjected to anti-LGBTQ laws often experience increased anxiety and depression due to societal stigma," would effectively highlight the central idea of the passage regarding the psychological effects of such laws.
If you have a specific passage in mind, feel free to share it, and I can help identify the relevant selection.