What ideology supports the belief that one sex is superior to the other?

The correct choice reflects the belief that one sex is inherently better or holds more power than the other, which is the essence of sexism. This ideology manifests in attitudes, behaviors, and institutional practices that discriminate against individuals based on their sex. Sexism can lead to the marginalization of one gender while promoting stereotypes and assumptions about capabilities and roles in society. This belief system can influence various areas, including the workplace, education, and family dynamics, reinforcing inequalities between sexes.

In contrast, feminism advocates for the equality of the sexes and works to dismantle the societal structures that uphold gender-based disparities. Patriarchy is a social system where men hold primary power, often leading to sexist outcomes, but it is not synonymous with believing one sex is superior; rather, it describes a broader societal structure that enables such beliefs. Androgyny involves blending or mixing male and female characteristics and does not pertain to the superiority of one sex over another. Therefore, sexism is the most accurate term to describe the ideology that supports the belief in the superiority of one sex over the other.