Question 2
What is the difference between primary and secondary sexual characteristics?
The right answer is the one marked above.
Primary are the reproductive organs, present from birth; secondary appear at adolescence. Body shape, hair and voice are secondary, and they appear only when the hormones arrive.
The division is by when they are present, not by which sex has them or which are hormonal — both sexes have both kinds, and it is the secondary ones that hormones bring about.