Seawater evaporates and becomes vapor. It is cooled in the sky and becomes clouds. Clouds make rain and it falls down on the ground and sea. Water circulates like this.
Herbivorous animals eat plants and carnivorous animals eat herbivorous animals. They die in due time and their dead bodies become nutrition for plants. Life also circulates like this.
People work and get money. They buy things and services from companies. Companies get a profit from customers and distribute the profit to their work
