Which idea differentiates the Protestant doctrines of Calvinism and Lutheranism

predestination

Explanation:

In simple words, Predestination relates to the religion founded on the idea that all occurrences are the well being of God surrounding the ultimate destiny of the human soul.

Calvinism accepts the total predestination under which certain individuals are doomed to eternal reward and others to eternal justice. Calvinism accepts that religion contributes to redemption, and does not recognise the history of the Church as the basis of faith.

Lutheranism recognises that the principle of justification has been founded only on salvation by faith as well as Scripture. Lutheranism views Scripture as that of the supreme source on all matters of religion.

figureit out

explanation:

because scientists need to know the stars so they understand space