i don’t mean to be nit picky, but here are some improvements that could be made:
1) saying “different themes” is not only broad, but somewhat vague. try and narrow it down to a specific theme. you can easily search up common themes found in works of literature (ex: human nature, justice, individual vs. society). other than that, it’s perfect.
2) as similar to the first piece of advice, be specific to the type of symbolism you’re referring to. also, instead of saying ‘to each culture’ you could say to their respective cultures (to make it sound more academic).
good luck! :)