Is there a missing comma here? In order to try to achieve these goals the article is therefore divided into six sections tackling the main aspects of the question.
You didn't ask, but if this is written by you, as well as inserting the comma, I'd get rid of 'therefore': it's redundant. And at the end, if each section deals with one aspect, I'd write: '... six sections, each tackling one of the main aspects of the [question - or, more commonly, 'issue', assuming it is not an actual '?' question that is being tackled, although the appropriate word would depend on the context ('problem' and 'matter' are other possibilities)]'.