Someone who moves his or her body with a perfect balance and that uses correct movements that allow them not to miss a step or beat is someone who has a great coordination, and that can make this kind of movements in a quick way. This is a definition of someone who is agile, which is the correct answer to complete the sentence.
4. hints more at the subject going to many future places "everywhere you may go" - he is expected to go "everywhere". 5. is more of an open, 'nobody knows where you'll go' kind of sentence, 6. is quite alike to 5. If you have to pick one for fluency, I think that 5 flows the best.
