The image contains elements that might be protected by copyright/trademark (logos, brands, specific buildings etc.), can identify a property/product (letters, numbers), or could raise usage problems, therefore it doesn't qualify as a RF stock image. Analyze the photo closely and remove these elements if possible or try to obtain a property release. Read more: http://www.dreamstime.com/thread_148
The image includes recognizable individuals. It cannot be accepted without a model release signed by your subject(s). If the people within your photo are not the main subject but their faces are visible, then you also need a MR for each person whose face is visible. You can download the model release document from the following address: http://www.dreamstime.com/model_release.pdf
The info you provided for this image is too general. Please be more specific about locations, landmark names and flora/fauna species. Also try to explain briefly what makes your image stand out or significant as compared to the ones already online