Final answer:
The Two-Spirits of indigenous North American societies incorporated both masculine and feminine qualities and cannot be accurately described as a supernumerary sex. They held esteemed roles in their communities, and the term was coined to honor a heritage that viewed gender roles as fluid and complex.
Step-by-step explanation:
The concept of "Two-Spirits" (formerly called berdache) in many indigenous North American societies is a notion that challenges the prevalent binary view of gender as simply male or female. These individuals were recognized to encompass both masculine and feminine qualities, fulfilling variant gender roles in their communities. Rather than strictly transitioning to the opposite gender, they embodied a masculine or feminine variant of the sex assigned at birth, with roles that could include tasks commonly associated with both men and women.
In several Native American societies, Two-Spirit individuals were often esteemed for their abilities to mediate between genders and take on roles such as healers and spiritual leaders. The term 'Two-Spirit' was coined in 1990 to honor the heritage of variant gender in Native cultures, signifying people with both male and female spirits. This reflects a conception of gender that is more fluid and accommodating of diversity than the rigid binary system more common in European and Euro-American societies.
The notion of supernumerary sex refers to the presence of more than two sexes. Given that Two-Spirit individuals were not simply a 'third sex' but rather people embodying multiple gender identities and roles, it is inaccurate to label them as an example of a supernumerary sex. Therefore, the statement that the Two-Spirits of many indigenous North American societies is an example of a supernumerary sex is b-false.