Adi - this is a good start but needs a bit of work to get top scores.
your introduction should contain a short dissection of the argument - mentioning the author's reasoning and be a little more clear on the fact that you are discussing the logical flaws - as written it is OK but feels like it is "missing something."
Your body paragraphs have good topic sentences a basic analysis but could be improved by including 2 -4 sentences of explanation, your second body paragraph seems conspicuously short.
It is fine to mention how to strengthen the argument in it's own paragraph but the essay should also contain a conclusion paragraph that is separate. As written I would give this essay a 3 or 3.5
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