Animals depend on green plants for food, oxygen, shelter, and in some cases, for camouflage and protection. Green plants are the primary producers in most ecosystems, converting sunlight into energy through photosynthesis. This energy is then passed on to animals through the food chain. Additionally, green plants release oxygen as a byproduct of photosynthesis, which is essential for animals to breathe. Animals also rely on green plants for shelter and nesting materials, as well as for camouflage to hide from predators or prey.