Answer: The organizational levels of the ecosystem from the basic on the left to complex;
Organism, population, community, ecosystem.
Explanation:
Organizational levels of the ecosystem show the order of level from basic to complex. It start from;
1. Organism refers to singular specie.
2. population is the total number of species occupying a geological area.
3. Community refers to group of populations of different species interacting and living together in an area.
4. Ecosystem is a community of different living species interacting with their abiotic environment.