Some of the devices that are used to capture the kinetic energy in the waves as they break against coastlines.

There is kinetic energy in the waves that occur on the ocean surfaces, as well as in the waves as they break against the coastline. 

Offshore devices capture the energy in the waves on the open sea. 

Potable water is water that is of sufficient quality to be consumed as drinking water.

Tidal power converts the kinetic energy within the mass of moving water into electricity. This includes underwater currents which tend to be tidal. This energy can be harnessed to generate electricity. Unlike electricity from wind power, tidal power is predictable and reliable.

Biofuels refers to the use of biomass material as a fuel source. Biofuels are created from dead biological material (this does not include fossil fuels even though these are also derived from biological material).