Final answer:
The statement is false. Research, like that by Kinsey, shows a much higher instance of non-heterosexual behavior than 1%, indicating the natural existence of a broad spectrum of sexual orientations.
Step-by-step explanation:
The statement claims that the author argues against Natural Law theorists by saying researchers suggest that 1% of humans naturally lean towards non-heterosexual behavior, thereby implying that the 'argument from nature' should apply to heterosexuals as well. This claim is false. In fact, the data, such as that presented in 'Sexual Behavior in the Human Male' (1948) by Alfred Kinsey, indicates a much higher prevalence of non-heterosexual behavior. His research suggested that 37% of the male population had a homosexual encounter, and 10% were predominantly or exclusively homosexual for an extended period of their adult life. This challenges the notion of heteronormativity and indicates that a spectrum of sexual orientations naturally exists among humans.
Natural Law Theory generally posits that moral rights and wrongs are intrinsic to human nature and can be discerned through reason, but it is often critiqued by pointing out the complexity and variance of human sexuality, as well as the influence of the environment on human behavior. Furthermore, evolutionary theory and modern research question the assertions of Natural Law Theory, suggesting that the understanding of what is 'natural' is too restrictive when it is based solely on reproductive capability. Researchers suggest that a variety of behaviors, including those related to sexual orientation, have developed for numerous reasons, including but not limited to survival and reproduction.