Complex sentence: Dowry harassment and dowry death occur in situations in which the groom's family becomes dissatisfied with the dowry or with delays in receiving it, then reacts by humiliating the bride and subjecting her to physical abuse.
Split into simpler sentences: Dowry harassment and dowry death occur in situations where the groom's family get dissatisfied with the dowry or on account of the delays receiving it. They react by humiliating the bride and subjecting her to physical abuse.