Answer the following question given this paragraph: 

With fossil fuels becoming more expensive and less available, scientists are looking for other energy sources. Hydrogen has long been considered an ideal source, since it does not pollute when it burns. The problem has been finding ways to generate hydrogen economically. One new approach that is being studied is photoelectrolysis – the generation of electricity using photovoltaic cells to split water molecules. This technique is still in the research stage, but appears to be a very promising source of power in the future.


Q: What is the generation of electricity using photovoltaic cells to split water molecules called?

 Choices:

- hybrid electricity

- aqua-electricity

- photovoltaic cells

- photoelectrolysis

A:
photoelectrolysis
