Our morality, our rationality, our ability to think logically rather than on the level that most animals do (survival of the fittest). Our unique ability to create and destroy, our innovation, and our adaptability. Our emotions play a part too - our ability to feel on a broader spectrum than most animals separates us from them. Our ability to communicate with eachother, despite living across the world making different sounds with our throats. Our ability to question and reason, and the ability to test these.
Typically, when a robot creates, its work is designed based on collective data. Its ability to function is based off of human capabilities, thus making them similar to us, though not quite. Robots, unless they are extremely evolved, do not have our unique abilities to create or feel. A robot writing a book would be different from a human - a robot's range of emotions differs and is severely limited. As of now and the near future, robots will not be able to feel empathy, anguish, grief, or happiness like we do.
Animals can exhibit these traits as well, but not to the degree humans can. We're more developed. We've evolved differently from them. Where we were once they prey, we are the hunter.
We've adapted to be the superior life form on this planet as of today. Humans are weak - without our minds, we would not make it in this world. We are not as strong as gorillas, or as spindly and athletic as monkeys. Most of us just aren't. But our adaptability to our environments has helped us survive - our evolved minds have allowed us to live, well, everywhere. Sure, humans create and destroy. But this isn't a moral issue - humans are the superior life form. I don't see lions teaching in universities, or wolves running nurseries. Monkies are close, as are dogs that have been domesticated from centuries of breeding and close contact to humans. The truth is, very few animal species can match our wit. While we may sometimes seem dumb, we aren't. Do you think animals really care about climate change? They're affected too, so why aren't they protesting? Probably because the only thought on their minds is their next meal.
Animals have a long way to go before they can match us. In terms of intellect. Our minds are what set us apart from other animals in the kingdom.