Which of the following group of organisms feeds directly on green plants?

The group of organisms that feeds directly on green plants are called "Primary Consumers". Primary consumers are herbivores, which means they eat plants as their main source of food. They are the first level of consumers in the food chain and they rely on the energy and nutrients from plants to survive. For example, a caterpillar that feeds on leaves, a rabbit that grazes on grass, or a deer that browses on shrubs are all examples of primary consumers. These organisms are an important link between the producers (plants) and the rest of the food chain, as they convert the energy and nutrients from plants into forms that can be used by other organisms.