Answer:
Sex.
Step-by-step explanation:
Sex is a term that defines a man or woman based on biological characteristics.
A man has various biological characteristics such as reproductive organs, beards, hormones (testosterone), broader chest, broaden shoulders, chest and facial hair, chromosomes (X and Y) etc.
On the other hand, the biological characteristics of a woman includes broader hips, mammary glands, chromosomes (XX), hormones (oestrogen), external genitalia, ovaries etc.
Hence, the sex of a human is broadly categorized based on their biological characteristics as man or woman.