The Three Branches of Government
Food, Water, and Shelter
Water is representative of the legislative branch. The legislative branch makes the laws and you can't have laws in the first place without having the legislative branch. Just like water you cannot survive without it you maybe able to survive without food or shelter for a couple of days but you can't survive without water at all. Just like the constitution can't survive without the legislative branch.
When trying to survive in the wild what really decides how long you can survive is shelter. Like the executive branch which carries out laws shelter really decides how long you can survive like the executive branch decides how long laws can survive because the laws cannot survive without being enforced. Even though they are all important, to survive the longest shelter is the most important necessity just like all three branches of government are important but the executive branch is the most important
Checks and Balances
Although food, water, and shelter are completely different things they all work together to provide basic survival. Just as the 3 branches of government provide very different functions, they form the government that runs and protects our country.