Which idea did Northern European art emphasized?

realism

Explanation:

The overall effect was one of classical harmony and idealized form. In contrast, Northern European artists emphasized realism. Developing the medium of oil paint, they created altarpieces and panel paintings for churches and chapels that reflected the more somber sensibility of the Protestant Reformation.

i got 3,4 and 5 as an answer

no one should discriminated against because he or she is not from a minority group