Which test or book is it? So many members here gave asked about this camping article? The structure of the sentence: 1. What is one of the features of modern camping? 2. The feature is concerned with nationality. If you combine these two sentences, you have the sentence that you quoted. As we have previously pointed out (many times), the article is quite badly written: confused logic and bad English. Why do you want to spend time struggling with it?

Do you mean the word "where"? We can use "where" to refer to a situation, as well as its regular use for locations.