Section 304-B of the Indian Penal Code, 1860, specifically defines and provides punishment for the offence of "Dowry Death." This section was inserted to combat dowry-related violence and deaths. It creates a legal presumption that if a woman dies under unnatural circumstances within seven years of marriage and was subjected to cruelty or harassment for dowry soon before her death, her husband or his relatives are deemed to have caused her death. Other options are incorrect: S.304-A is for causing death by negligence, S.304 is for culpable homicide not amounting to murder, and S.305-B does not exist.