What is the similarities of ethnicity and culture?

Membership of an ethnic group tends to be defined by a shared cultural heritage, ancestry, history, homeland, language or dialect, symbolic systems such as religion, mythology and ritual, cuisine, dressing style, art or physical appearance.“Ethnicity” is linked with cultural expression and identification. However, both are social constructs used to categorize and characterize seemingly distinct populations. Ethnicities share a cultural background

Explanation:

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.