Birds are uniquely classified from other organisms because they all have feathers.
Birds are uniquely classified from other organisms because they have feathers. To determine this, you can carefully analyze the characteristics of birds compared to other organisms. Birds are warm-blooded, have beaks, lay hard-shelled eggs, possess wings, and can fly. Additionally, they have unique features like feathers, which are lightweight and serve various purposes such as insulation, flight, and display. While other organisms may have certain similarities to birds, such as laying eggs or having wings, the presence of feathers is a distinct and defining feature of birds. Therefore, the correct answer is "have feathers."
