Answer:
By getting a tutor to help you :)
Explanation:
A global citizen is someone who self-identifies first and foremost not as a member of a state, a tribe or a nation, but as a member of the human race, and someone who is prepared to act on that belief, to tackle our world's greatest challenges.
The main idea doesn't explain in detail why it is the main idea. It doesn't prove that it is the main idea, it only states so.
