The Hindu belief that focuses on the effect of a person's actions in this and in previous lives is known as karma. To arrive at this answer, one can study the core concepts of Hinduism and their significance. Hinduism teaches that every action or deed (both good or bad) performed by an individual creates an energetic force known as karma. This karma is believed to determine the quality of one's future experiences and influences their reincarnation, or rebirth, into subsequent lives. By examining the choices and consequences of actions in Hinduism, it becomes clear that the concept of karma directly aligns with the belief in the effects of a person's actions in this and in previous lives.
The Hindu belief that focuses on the effect of a person's actions in this and in previous lives is D. karma.
