In Arabic it is defined indeed. However, it is not common in English to say: I love the nature. In English it is mostly dropped in such sentences (unless you want to add something to it, like "the nature of science" for example)
Not common true but i think it should probably still be an accepted answer. "Do you like New Zealand?", "Yes i really liked the nature".
sometimes the correct answer is "nature" and sometimes the correct answer is "the nature" I think this is not right; although saying "the nature" is not common, it is not a wrong answer.