Which of these causes the release of neurotransmitter molecules?

Why are pipes bursting in the in extremely cold weather?

What shape would a molecule with two bound groups and two lone pairs have?

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !