meg researched the biodiversity in four water ecosystems x - low niche diversity and cold water temperatures y - high niche diversity and cold water temperatures z - high niche diversity and warm water temperatures w - low niche diversity and warm water temperatures which ecosystem likely has the highest biodiversity? xyzw

The answer is Z, hope this helps:))

The niche Z with high niche diversity and warm water temperatures has the highest biodiversity. Niche diversity refers to the variety of species present in a given niche and, the variety of adaptations that they have to survive in the given niche conditions. Biodiversity is the variety of animals and plants that can be found in a given habitat. As higher niche diversity and, warm water temperature favor the growth of many organisms it would lead to higher biodiversity.