Though the general necessities for all organisms remain the same, what makes them diverse is that all organisms have special needs to fufill. For example different creatures have different kinds of food and ways to find food. The same rule applies for other animals . They all have different techniques to find water, food, habitat and ways to take in oxygen or air. For example, how rabbits only have vegetables and grass and don't consume living animals, though the lion does to catch its prey.
All living things are living things because they all have 4 things they have in common. Number one, they are All made out of one or more cells, they can reproduce, they respond to changes and can grow and develop. For example, how a sunflower grows from one seed and then evolves into a beautiful plant.