You can approach the "social" thingy in two ways.
On the one hand, take a deadpan, apparently banal picture of something significant ("this is the tuft of grass over which so-and-so did something major"). That's the conceptual art school approach.
On the other hand, you can look for graphic evidence of something. For instance, very old staircases made of stone have these impressive grooves in them because of time and usage. That's the more traditional approach.
Finally, you might want to ask your teacher what the heck "social landscape" means.