Simplify the following text for a Grade 11 native English-speaking person.
Original: His hard hitting style was displayed to great effect on many Led Zeppelin songs , including `` Immigrant Song '' ( Led Zeppelin III ) , `` When the Levee Breaks '' ( Led Zeppelin IV \/ ) , `` Kashmir '' ( Physical Graffiti ) , `` The Ocean '' ( Houses of the Holy ) , and `` Achilles Last Stand '' ( Presence ) .
Simplified: Led Zeppelin went on to release albums such as `` Led Zeppelin IV '' ( which was originally un-named ) , `` Houses of the Holy '' , and `` Physical Graffiti '' .