Answer:
The correct answer is option 4. "Z".
Step-by-step explanation:
A water ecosystem with high niche diversity and warm water temperatures will likely have a high biodiversity. High niche diversity refers to the presence of multiple traits in the same or different species, which is a characteristic of ecosystems with a high biodiversity. Additionally, a warm water temperature promote most species to reproduce, which also has a positive impact in biodiversity. However, temperatures above warm will affect biodiversity as oxygen is less soluble in hot waters and some species do not survive in this condition.