You will be given a definition of a task first, then some input of the task.
Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

wave power means the use of ocean surface waves and the capture of that energy to do useful workincluding electricity generation, desalination, and the pumping of water (into reservoirs).
Output:
wave power