sentences: the moon is a sink of sound matter called shadow & the moon is a sink of light matter called shadow ->  the sun is a source of light and heat energy  the sun is a source of light and heat energy & a sink of something emits / converging / generates / provides that something ->  the sun produces light and heat energy  the sun produces light and heat energy & nuclear skills are the sink of the sun's matter ->  the sun produces light and heat energy through nuclear reactions  the sun produces light and heat energy through nuclear reactions & a stripe is a sink of sound / sound matter through nuclear passes -> the sun is a kind of star