Concept:A Ports Authority manages and regulates port activities, not shipping operations.Explanation:Providing facilities for loading and off-loading of vessels is a core port function.Collection of dock dues is also done by the port authority.Dredging of harbours keeps channels safe for ships and is a port responsibility.Providing enough ships for the country is not a function of the Ports Authority.Ships are owned by shipping companies or private owners, not the Ports Authority.Answer:Option C is the correct answer.