Simplify the following text for a Grade 11 native English-speaking person.
Original: Scuba diving ( `` SCUBA '' originally being an acronym for self contained underwater breathing apparatus , now widely considered a word in its own right ) is a form of underwater diving in which a diver uses a scuba set to breathe underwater .
Simplified: The word Scuba is an acronym from self-contained Underwater Breathing Apparatus .