The membership in a “particular social group” (“PSG”) asylum category is the most difficult of the five grounds to define, and the subject of many legal arguments. Learn more here.
If you are physically present in the U.S., and are applying for asylum, you should also apply for two alternative forms of relief if you fear persecution or torture in your country of origin.
In case your asylum applicant is not granted, make sure to alert the authorities to any risk that you might be returned to a country where you'll be tortured.