Concept:Sex refers to biological differences, while gender refers to socially constructed roles and identities.
Explanation:Sex is determined by physical and biological attributes like chromosomes and reproductive organs.
Gender is built by society – it includes roles, behaviors, and expectations assigned to men and women.
For example, being a breadwinner or nurturer is a gender role, not a biological fact.
Thus, sex is biological, and gender is a social construct.
Answer:A. biological, socially constructed