Before her baby was born, Beth watched an ultrasound picture of the fetus in which the genitals were clearly visible. Beth said, "It's going to be a boy for sure!" Strictly speaking, Beth is referring to the unborn infant's:

sex

Explanation:

Sex is a term that describes the biological and physical traits that differentiates a male from a female. The difference in genitalia and genetic is usually the bases upon which the society uses in differentiating a male or female based on their sex.

For example, as stated in the question above, Beth categorized the unborn infant as a boy based on the clearly visible genitals that she can see through the aid of an ultrasound picture of the fetus. Beth is referring to the unborn infant's sex.

it was known as the aztec empire. the capital was formally named tenochtitlan. *hope this .