You have a minor grammatical mistake in the following sentence:
The most powerful country in the world, but it has it's own disadvantage too, you will know Nigeria is a free country if you travel abroad.It should be its own instead of it's own.
You have a minor grammatical mistake in the following sentence:
The most powerful country in the world, but it has it's own disadvantage too, you will know Nigeria is a free country if you travel abroad.It should be its own instead of it's own.