What term refers to a person whose physical, emotional, and/or romantic attraction is for people of the same sex?

The term that refers to a person whose physical, emotional, and/or romantic attraction is for people of the same sex is "gay." This term is commonly used to describe men who are attracted to other men, but it can also encompass women who are attracted to other women in a broader sense. The concept of being gay is an integral part of the LGBTQ+ community and highlights the diversity of sexual orientations.

In contrast, the other terms listed refer to different identities or concepts. "Transgender" pertains to individuals whose gender identity differs from the sex they were assigned at birth, rather than their sexual orientation. "Heterosexual" defines individuals who are attracted to people of the opposite sex, which does not align with the question's focus on same-sex attraction. "Celibate" refers to a person who chooses to abstain from sexual activity, which is not specifically about attraction to any gender but rather a choice to refrain from sexual connections.