Why does a hurricane weaken when it moves toward land?

Yes a hurricanes need water to continue to move as there becomes less water the weaker it will be

B.  It’s not fed with moisture on land.

100% ;-)

Explanation: Wind speeds up to 150 mph. Once a tropical system moves inland, the storm will usually weaken rapidly. This is due to the lack of moisture inland and the lower heat sources over land. ... While the sustained winds are reduced because of the dampening effect of larger roughness over land.