The fraternal birth-order effect refers to a factor associated with

A) ostracism.
B) orgasm.
C) sexual disorders.
D) sexual orientation.

Fraternal Birth-Order Effect

The phenomenon that suggests a correlation between a male's birth order among his siblings and his likelihood of being homosexual.

Sexual Orientation

An enduring pattern of romantic or sexual attraction to persons of the opposite sex, same sex, both sexes, or neither sex.

Ostracism

The act of excluding or shunning someone from a society or group.