Answer:
Sealed bottle gardens are a perfect example. They contain soil, a few plants which were watered once. The plants were able to photosynthesise and respire, nutrients and water were continually recycled as the container was sealed.
Step-by-step explanation:
A balanced ecosystem represents a sustainable habitat of interdependent animals, plants, and microorganisms and their environment. Balanced ecosystems display efficient energy and material cycling and interconnectedness between primary producers and predators.