To answer this question, we need to understand the concept of natural harbours.
A natural harbour is a sheltered body of water formed by natural geography, such as a bay or an inlet, that provides protection to ships from wind, waves, and currents.
Let's go through each option to determine which one is considered the world's finest natural harbour:
Option A) Sydney harbour - This option is correct. Sydney Harbour is widely regarded as one of the world's finest natural harbours. It is a large, deep, and stunningly beautiful harbour located in Sydney, Australia. It offers sheltered waters and is surrounded by iconic landmarks such as the Sydney Opera House and Sydney Harbour Bridge.
Option B) Toronto harbour - This option is incorrect. While Toronto Harbour is a significant harbour on Lake Ontario, it is not considered one of the world's finest natural harbours.
Option C) New Jersey harbour - This option is incorrect. While New Jersey has a number of harbours along its coastline, none of them are considered the world's finest natural harbour.
Option D) Singapore harbour - This option is incorrect. While Singapore Harbour is one of the busiest and most important ports in the world, it is not considered the world's finest natural harbour.
The correct answer is A) Sydney harbour. This option is correct because Sydney Harbour is widely recognized as one of the world's finest natural harbours due to its size, depth, and iconic landmarks.