Concept:Ecological diversity refers to the variety of ecosystems present in a particular geographical area.
Explanation:Biodiversity operates at three different levels of biological organization.
These levels are genetic diversity, species diversity, and ecological diversity.
Ecological diversity specifically includes ecosystem diversity.
It describes the variety of habitats, communities, and ecological processes found in a region.
For example, India has greater ecosystem diversity than a Scandinavian country like Norway.
This is because India has deserts, rainforests, mangroves, coral reefs, and alpine meadows.
Greater ecosystem diversity also indicates greater overall biodiversity.
Therefore, ecological diversity includes ecosystem diversity alone, not the other two levels.
Answer:C. Ecosystem diversity