I assume here that we mean the thick, characteristic hair that does not appear in women (since women also have some thin and white facial hair) - this is something that appears only at puberty and it's a physical characteristics.
This is then an example of a secondary sex characteristics - the answer is A).
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Stage 1
Low
Growth
<span> Very high CBR, Very high CDR, <span>Very low NIR
Stage 2
High Growth
High CBR, Rapidly declining CDR, Very high NIR
Stage 3
Moderate Growth
Rapidly declining CBR, Moderately declining CDR, Moderate NIR
Stage 4
Low Growth
Very low CBR, Low or slightly increasing CDR, zero or negative NIR</span></span>
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