National unity means the unity of the people of a country. It is the unity of the citizens of a country. It is the unity of the people of different regions, different religions and different communities.
National unity is very important for the progress and development of a country. It is only when the people of a country are united that they can progress and develop. It is only when the people of a country are united that they can face any challenge.
National unity is very important for the security of a country. It is only when the people of a country are united that they can protect their country from the enemies.
National unity is very important for the economic development of a country. It is only when the people of a country are united that they can work together for the development of the country.
National unity is very important for the social development of a country. It is only when the people of a country are united that they can live in harmony and peace.
So, we can say that national unity is very important for the progress and development of a country.