Question

what is human sex usually linked to?
a cultural norms
b biological and physical traits
c gender roles
d societal expectations

Explanation:

Human sex refers to biological classification (male or female) based on physical and biological traits like chromosomes, reproductive organs, etc. Cultural norms (A) relate more to learned behaviors in a culture. Gender roles (C) are social constructs about how males/females should act. Societal expectations (D) are broader social - level anticipations. Since sex is fundamentally about biological and physical aspects.

Answer:

B. Biological and physical traits