Why does this world exist?
I think you don’t have any other question to ask! Why does this world exist? I have no idea! But instead of finding why this world exists, you can ask, 'Why do I exist'.
I have answer for that. You are here to make this world a better place. You are here to celebrate life and not to complain and brood over life.
For the question, ‘Why does the world exists? Why is there so much diversity?’ This is more a wonder than a question. And you already know the difference between wonder and question. Wonder is not looking for an answer, it is just wonderment. 'Vismayo Yoga Bhoomika'. Wonder is the preface for yoga. So, I will leave you to wonder about why there is so much diversity. This wonderment can take you to the wonderland of yoga.