No it is not.
Kangaroo Island is not World Heritage listed.
Robben Island was named a World Heritage site in 1999.
Henderson Island in the South Pacific Ocean was chosen as a World Heritage Site because it meet criteria X (10) of the Cultural Criteria, see the World Heritage Link below.
In Mozambique, there is one world heritage site. It is called the Island of Mozambique. This cultural site is the fortified city of Mozambique which was a former Portuguese trading post on the route to India. It was given World Heritage status in 1991.
Robben Island was the prison turned museum that was among South Africa's first World Heritage sites in 1999.
Komodo Island has 5,700 giant lizards living on the island. They are not found any where else in the world.
Stonehenge is a World Heritage site.
No, Wave Rock is not a World Heritage Site.
Alcatraz is not a World Heritage site at this time.
yes, yes it is a world heritage site
The City of Valletta was declared a World Heritage Site in 1980.
Timbuktu was inscribed as a World Heritage site in 1988.