Explanation:

A World Heritage Site is a place that is listed by UNESCO for its special cultural or physical significance. The list of World Heritage Sites is maintained by the international 'World Heritage Programme', administered by the UNESCO World Heritage Committee.

• It seeks to encourage the identification, protection and preservation of cultural and natural heritage around the world considered to be of outstanding value to humanity.
• The sites can be delisted from the World Heritage List.
• Eg. Recently, the city of Liverpool, England has been removed from UNESCO’s (United Nations Educational, Scientific and Cultural Organization) list of world heritage sites.

Reasons for Delisting: The new buildings including a football stadium undermine the attractiveness of its Victorian docks and were destroying the heritage value of its waterfront.

• The over development would irreversibly damage the heritage of the historic port.

Other Delisted Sites

• Wildlife sanctuary in Oman in 2007.
• Reason: poaching and habitat loss.
• Dresden Elbe valley in Germany in 2009.
• Reason: A four-lane motorway bridge was built over the river.

Hence statement 1st is correct.