The open-ocean zone order that shows decreasing temperature is as follows:
1. **Surface Zone:** This is the warmest layer of the ocean because it receives direct sunlight. The temperature is higher in this zone compared to deeper layers.
2. **Transition Zone:** As you move deeper into the ocean, you encounter the transition zone where the temperature starts to decrease from the surface zone. This zone acts as a buffer between the warmer surface waters and the colder deep waters.
3. **Deep Zone:** The deep zone is the coldest layer of the ocean. The temperature continues to decrease as you go deeper into this zone due to the absence of sunlight and the influence of cold currents.
Therefore, the correct order from warmest to coldest in terms of temperature is Surface Zone, Transition Zone, and Deep Zone.
