Draw a cat using geometric shapes and lines. It might look like this. You have just thought about what makes a cat unique among other animals. Now think about how a cat feels and how it behaves. A cat can have many moods just like we do.
Cats can be lazy creatures, hunters, or angry beasts.
Think of how the cat you have just drawn would look if it were scared and angry or happy and tired. As an artist you are going to draw a cat in different moods. You can draw any creature just by thinking about it as a set of simple geometric shapes. When you have your basic shape then just add the other characteristics that make it unique.