Short answers, pulled from the story.
The word salvation is derived from the Latin salvatio, meaning safe or saved. This etymology reveals the core intent of these beliefs as deliverance from harm, whether that harm is physical, social, or eternal.
Judaism focuses on the collective destiny of a people rather than individualistic hopes and does not subscribe to the doctrine of original sin. Salvation in this tradition is closely tied to the idea of redemption and is inextricably connected to the salvation of the entire people through the teachings of the Torah.
Christianity centers the entire divine plan on the incarnation and death of Jesus Christ, which formed the climax of a strategy conceived by God before the creation of the world. For Christians, salvation is only possible through Jesus Christ, whose death on the cross was the once-for-all sacrifice that atoned for the sin of humanity.
In the Indian subcontinent, salvation takes a form that is entirely self-attained, focusing on liberation from the sañsāra, the cycle of rebirth perpetuated by passions and delusions. The word moksha, meaning liberation, or mukti, meaning release, describes a state and the conditions considered necessary for its realization.
The religion is built on five principles that are mandatory acts of worship, including testifying that none has the right to be worshipped but Allah and Muhammad is Allah's Messenger, offering compulsory prayers, paying Zakat to the poor and needy, performing the Hajj pilgrimage to Mecca, and observing fast during the month of Ramadhan.
The Church presents a unique plan of salvation that extends the opportunity for redemption to all humankind, whether they choose to accept the grace of Jesus Christ in this life or in the world of spirits of the dead. Members perform vicarious work for the dead in sacred temples to allow them to receive salvation on the same terms as the living.