Question

how can person become a pride nation

Answer 1

They can if that person is the best in the world in their field and at the same time can evoke passion to his fellow countrymen for that field encompassing the while nation.

It’s a unanimous or collective joy and confidence for a single person.

Like Bob Hope, Frank Sinatra and Beyonce.
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Answer 2

I think the persons who are freedom fighters, scientists, astronaut etc. means who do something for our nation and the one who is fully devoted to nation.

Hope it helps you.