They are called neurotransmitters
If the water cycle were to stop, lakes, rivers and groundwater sources would dry up, glaciers would disappear and precipitation would stop falling. All freshwater resources would be negatively impacted, and life on Earth would completely cease. The lack of freshwater would make it impossible to grow food.
Hope this helps!!!
Answer: Deep ocean currents are affected by temperature but not by salinity.
Explanation: I think it's this because I know it takes a while for deep ocean currents to move so it isn't the first one.