Hey You!
Two important underlying principles of the NIMS are flexibility and standardization.
Because there always needs to be something that starts it off. Eg: If there was no grass, there would be no animals.
There are multiple energy source in the ocean. The one thats probably the most common one are Dams. Although Dams can cause some serious flooding. Another one is Tidal energy. Tidal energy is something that turns the energy of tides into energy through Kinetic motion.<span />