Which sentence sounds better?

Question

*A 13 year old girl needs at least 1 hr. or exercise each day.

*A 13 year old female needs at least 1 hr. of exercise each day.

*A 13 year old female girl needs at least 1 hr. of exercise each day.

Please Help!!
Thanks!!

Answer 1

*A 13 year old girl needs at least 1 hr. of exercise each day.

You certainly don't need "female girl" in one sentence; it's redundant.

Answer 2

the second one seems good to me, definetely not the last one

Answer 3

Sorry, the 1st one IS better

Answer 4

I would go with the first sentence. The word "female" isn't used that much in informal language and since the word "girl" already implies that the person is of the female sex, sentence nr. 3 has a word too many.

Answer 5

Thanks