Canon eos rebel, t3i, or nikon d3200?

I'm not really technical so I don't know how to use complicated options. I just want something with great quality you can use to take modeling pictures of people and close ups of nature. I like that the eos is smaller, but what has the best graphics for photographing people?

Added (1). by the way the modeling pictures are just of me and my friends for fun. I want high quality and good lighting

Taking modeling pictures of people is highly technical from a photographic stand point. Any DSLR or SLR would accomplish what you are after. But directing the model for the right response an lighting the model are the hard parts. The camera way to good quality in this or any other photographic situation where you HAVE to produce for the client, be they a firm or bride & groom is for the camera to be second nature in it's operation by you. So who ever put you in a box for the t3i or nikon d3200, is doing you a disservice. Yes they are good cameras, but are they good for you? Does one fell more comfortable in your hands than another? Which has the most comfortable viewfinder? You use a viewfinder to take professional pictures not the "LCD" screen. You might even include the Pentax K3 or other Pentax DSLR's. After 45 + yrs of owning film based Canon's, I switched to Pentax because I'm more comfortable with it and everything seems friendly and second nature from the get go!

You do realise that you'll need either extension tubes or a macro lens (Separate, expensive purchases) if you want to take close-ups with a DSLR?

The Pentax K-500 is also worth a look (and you can save money by using a used MF macro lens), while the Sony A-58 has better video performance than any of them.