национальная

национальная

"National."

Here, 'национальная' is used as an adjective to describe 'culture', emphasizing that the culture is related to the nation as a whole.

Национальная культура играет важную роль в сохранении традиций.

National culture plays an important role in preserving traditions.

In this case, 'национальной' agrees in gender, number, and case with 'economy', defining it as pertaining to the nation's economic system.

Эта политика направлена на укрепление национальной экономики.

This policy is aimed at strengthening the national economy.

Here, 'национального' modifies 'art', indicating art that pertains to or represents the cultural heritage of the nation.

Музей представил выставку национального искусства.

The museum presented an exhibition of national art.