Answer: option A : Younger than
Explanation:
Puberty is the term given to the period a child undergoes series of rapid and sequential developmental changes in order to attain mature adult reproductive function.
One can predict that Ellie having lived in a western country will likely attain puberty earlier than her mum or grandmother because of difference in nutrition, system of living and other environmental factors which may not have been obtainable during Ellie's grandmother's youthful period
