Answer:
Queer theory is referred as a field of critical theory which flourished in early 90's from fields of queer and women's studies. It tends to include both the theorization of 'queerness' and queer readings of texts. These were mostly influenced by work of Berlant, Bersani, Butler, Edelman, Halberstam, and Sedgwick, it was mostly build upon challenges of feminism to notion that gender is a part of self and further in gay/lesbian research' of socially built identity of sexual acts.