Answer:
Being rootless doesn't mean I don't belong to any one place; it means I choose to belong to many.
Step-by-step explanation:
The word 'rootless' means homeless or wanderer who does not have a permanent home or place to live. He lives at different places at different time.
In the context, the author tries to convey the message that he is a wanderer and does not have a permanent settlement place. He had lived at different places all over his life. So he does not belongs to a particular place but all places belongs to him.
He emphasize this by saying that being homeless or unsettled at a particular place does not mean that he don't belong to any one of the place, but he means he can choose to belong to may places or countries.