Final answer:
Biological status at birth determined by external genitals is referred to as one's sex, relating to biological differences that are anatomical and physiological in nature.
Step-by-step explanation:
The biological status as a male or female, usually established at birth by the appearance of external genitals, is called one's sex. This term relates to the anatomical and physiological distinctions between males and females, such as chromosomes (typically XX for females and XY for males), reproductive organs, and secondary sexual characteristics. Biological sex is distinct from gender, which refers to societal roles, behaviors, and attributes a society considers appropriate for men and women, and gender identity, which is an individual's personal sense of gender. Orientation, or sexual orientation, is about who one is attracted to and is also not the same as sex or gender identity.