The "largest" level of biological organization among the options provided is the ecosystem. Here’s a brief overview of the hierarchy from largest to smallest:
- Ecosystem: Includes all living organisms (communities) in a given area as well as the physical environment they interact with.
- Population: Groups of individuals of the same species living in a particular area.
- Tissue: Groups of similar cells that work together to perform a specific function.
- Cell: The basic unit of life.
So, in order from largest to smallest: ecosystem > population > tissue > cell.