I shall critique the introduction of your LA since others have already taken the liberty of reviewing for you. Hopefully, this gives you wider insight into the detriments of your piece.
The ongoing prominent/current/relevant issue of child obesity is once again a hot topic of debate within the media has come under renewed criticism following the recent implementation of a 'junk food ban' imposed upon school canteens. The editorial entitled ‘School life just became more fruitful’ which was published in ‘The Age’ (17/10/2006) postulates asserts/identifies that the underlying cause perpetrators of the matter, that is of childhood obesity are none other than their own educational institutions lies more with the schools and their respective canteens, subsequently announcing the recently enforced limit and ‘ban’ on junk food sold at school; all for the purpose of combating childhood obesity. However Conversely/On the other hand/In opposition, Michelle Wiese Bockmann’s article ‘Parents blamed for fat kids’ which appeared in ‘The Australian’ (01/08/2006), clearly denounces/villifies/vindicates contends that the blame ultimately lies with the parents of Australian families. themselves, hence arguing that the resolution of this issue not only lies with the school canteens and children themselves, but more so the families and parents in particular of Australian children.[you've already said all this, it's unnecessary and makes you sound mechanical (sticking to a set structure/formula)
Let me know what you think of my corrections