hair color and freckles a scar on the knee the need to breathe air the ability to roll the tongue
I gave my students this multiple choice question: Which of the following is not passed from parents to children?

Only one answer is correct among these 4 choices:
- hair color and freckles
- a scar on the knee
- the need to breathe air
- the ability to roll the tongue

Could you tell me which one is correct?

a scar on the knee