i am not savitra mam but the answer is:
संस्कृति - kisi bhi chez ke baren mein schone ki shamta,pravitri aur yogyata to sanstkiti kehete hain. eg- newton. he gave the gravitational law because he had the samta and nature to think so.
सभ्यता - kisi bhi chez ko aviskar ke roop mein prastut karna सभ्यता khealata hai. eg- newton ka putra. he can use newtons law for research purposes and can find new thing, can know more than his father but will remain सभ्य and cannot become संस्कृt .
hope this helps.