We did it for our trial, or something..
Feature article - pretty much means use the feature article style, casual but not colloquial, pretty personal, anecdotes blah blah blah. You should already have lots on feature articles.
If it asks YOU to be a visitor, YOU must write in the first person. YOU are the one who visits the worlds of the texts. Don't forget this! You probably won't lose marks if you write from John's point of view, but you'll have to use a postmodern excuse (eg he leaps from BNW to BR due to some miscalculation in the printing factory. Not very believable.)
Once you've figured out how you're going to "go" to the worlds of the texts (maybe you're writing for Open Road, or for some 'perspectives' magazine... or maybe you're just writing for a magazine which contrasts environments), you have to answer the question.
What have you learnt about how humans of these worlds connect with and/or shape nature?
Firstly define nature to yourself - you might want to do this in your feature article as well. What is 'nature' in these two texts?
Then que question asks: how do the humans relate to their environment? Do they attempt to change it, mould it, tame it, break it, destroy it? Do they connect with it at all?
You can compare the two worlds or you can write about them one after the other. How you organise your work is up to you and what you find easier. Usually simultaneous comparison is pretty difficult to maintain, so if you're having trouble just write about one world (say, BNW), then compare it to BR afterwards.
Have values shifted because of contextual changes?
Again define values - what sort of values is the question talking about? Values of the author? Societal values?
Then define contextual changes. The context of BNW is 1920s or 30s IIRC (look it up in the front of the book), and the context of BR is probably 1980s. One is a novel and the other is film. How does this affect the way the texts are read? How have environmental, societal, economic,... changes affected the way we view nature, we view society? How have these changes affected what we VALUE?
Note that both texts look at physical environmental nature. However where one text shows humans attempting to control and tame it, the other shows us having destroyed it and are moving to other planets. What does this tell you about how our values have changed ? Are we more cynical, or are we simply more detached?
Don't be scared of feature articles - they're not long and not very hard to write. Read a few (read Cosmo, read Wheels, read newspapers) to get into the swing of things and then start writing. Good luck!