Question

what is biological sex?
an individuals self - concept of being male or female
the way people communicate their gender within their culture
being male or female based on the chromosomes someone has
a persons sexual and romantic attraction to people of the same sex, the opposite sex, or both sexes

Explanation:

La sexo biológico se define por los cromosomas que una persona posee, lo que la clasifica como masculina o femenina. Las otras opciones describen conceptos relacionados con el género, la comunicación de género y la orientación sexual, respectivamente.

Answer:

being male or female based on the chromosomes someone has