The original prompt refers to children and teenagers. In your topic sentence, you only refer to children. There is a missing information point, the teenagers, both must be represented, using synonyms in your presentation. If you are making suggestions for reasons for the crime being committed, it would be better to not mention school environments yet. Mostly because you use the phrase "but I suggest", which means you are uncertain. Unless you can make a definite statement, it would be better not to mention the topic at all.
The first reasoning build up in your reasoning discussion was great. Then it lost cohesiveness when you presented the second reason in the same paragraph. You did not give as complete a reference discussion for that reason in the presentation, causing the paragraph to become under developed. Use one topic at a time to avoid this problem.
Your discussions needs to sound normal. It should not sound like you opened a dictionary and used "big words" in the hopes of impressing the examiner. The natural sound of the discussion, rather than trying to sound intellectual when your grammar for the most part of the presentation is problematic, will only serve to get you a lower LR score. So rather than saying
iniquitous cognizance
, you should instead, simply say, "Teaching young offenders to recognize when they are breaking the law" or "Teaching young offenders to identify when they are committing a crime..." would have been more effective, believable, and applicable to the presentation. Just because the word or phrase sounds impressive to you as an ESL, does not mean that you are using the word in the proper context. Which is the error you made in this presentation.