Student or Learner
what is the different between girl and lady?
in this sentence what should i use?
Marrying into a good family is considered to be a way of returning gratitude to parents, especially for a young girl.
Well, in the western world, a girl become a woman at a certain stage of puberty. A lady is a title of respect. It doesn't work in your example sentence. 'young girl' works just fine.
All the best.