sentences: light is a kind of light energy & solar energy is a kind of light ->  solar energy is a kind of light energy  solar energy is a kind of light energy & photovoltaic cells convert light energy into electricity / electrical energy ->  photovoltaic cells convert solar energy into electricity  photovoltaic cells are a kind of object & if an object converts something into something else then that object uses that something to produce that something else ->  if photovoltaic cells convert something into something else then those photovoltaic cells use that something to produce that something else  photovoltaic cells convert solar energy into electricity & if photovoltaic cells convert something into something else then those photovoltaic cells use that something to produce that something else ->  photovoltaic cells use solar energy to produce electricity  photovoltaic cells use solar energy to produce electricity & solar energy is a renewable / inexhaustible resource -> solar energy is a kind of renewable resource that is used by photovoltaic cells to produce electricity