What is the story of Arjuna and what is the problem Hinduism?

Arjuna is a central character in the Hindu epic Mahabharata. He is a skilled archer and a prince who faces moral dilemmas and inner conflicts, particularly during the Kurukshetra War. The main problem in Hinduism is the cycle of birth, death, and rebirth caused by karma, which is the accumulation of good and bad actions influencing one's future lives until liberation (moksha) is attained.