You have been busy! Have you an exam coming up soon?
This is another great essay. If you can write this in 40 minutes (the time recommended for Task 2 in IELTS), then that's really good - but it's tough to write 380 words in well-organized paragraphs without many errors.
I pasted the essay into the two links at the top of the page (http://www.online-utility.org/english/readability_test_and_improve.jsp and http://www.read-able.com/: See under 'Useful Links'): the essay is 380 words long, with an average sentence length of just over 16 words.
I have a couple of suggestions. In the introduction, I would make the thesis sentence more specific or more related to the topic. You wrote:
I will explore the reasons for this tendency and discuss its benefits and drawbacks.
This sentence could be used in many essays, and many students try to memorize sentences like this. You could make it more specific by adding some information about the topic:
- I will explore the background to this incredible variety of food and discuss its benefits and drawbacks.
- I will ask if this astonishing diversity of food comes at a high price.
- This essay will examine some of the issues surrounding the global trade in food.
- I will ask if we need such a range of food from across the world and suggest that local food is usually better.
In Paragraph 2, I would change the word 'delicacy' to plural - 'delicacies.' The reference in the final sentence in paragraph 2 is a little unclear: what is 'this development'? How do supermarkets take advantage of it?
I love the topic sentence in Paragraph 3:
However, imported food comes at a high price for consumers, the local agriculture and the environment.
It is a perfect signpost for the rest of the paragraph. There is an example given for consumers (imported food is not fresh), for local agriculture (farmers can't compete) and the environment (pollution from transport).
In the conclusion I would change the word 'delicacy' again to 'delicacies' and I would replace 'unseasonable' fruits with out-of-season or something else. Unseasonable has a negative feeling, like unexpectedly bad weather.
Otherwise, a really good - and interesting - essay!