Final answer:
Homosexuality was DE medicalized in the 1970s after activists fought to remove it as a mental illness from the Diagnostic and Statistical Manual of Mental Disorders.
Step-by-step explanation:
The DE medicalization of homosexuality occurred in the 1970s. Prior to this, homosexuality was classified as a mental illness by organizations like the American Psychiatric Association. However, through activism and protests, homosexuality was removed from the Diagnostic and Statistical Manual of Mental Disorders in 1973.