How can you prove the diversity of living organisms?

The variety of living organisms can be seen in a simple comparison of animals of different families and studying their evolutionary path. For example, if you compare animals such as sturgeon, ant and bear, you can see that they have nothing in common besides the fact that they all breathe. They even reproduce in different ways. It’s all about evolution, different animals adapted to life in different ways, which gave them the appearance and size that they now have. The climate is largely responsible for the variety of living organisms.