Auckland, city, north-central North Island, New Zealand. The country's most populous city and its largest port, Auckland occupies a narrow isthmus between Waitematā Harbour of Hauraki Gulf/Tīkapa Moana (east) and Manukau Harbour (southwest).

The Sargasso Sea, located entirely within the Atlantic Ocean, is the only sea without a land boundary.

Arakan Yoma is the extension of the Himalayas located in (D) Myanmar. The Arakan Yoma mountain range runs through the western part of Myanmar (Burma) and extends into southeastern Bangladesh.

The five oceans from smallest to largest are: the Arctic, Southern, Indian, Atlantic and Pacific.

1. The 23.5 degree parallel of latitude in the Southern Hemisphere represents the Tropic of Capricorn.

2. The Tropic of Capricorn (or southern tropic) is the circle of latitude in which the perihelion point occurs at the December (or southern) solstice.

3. Thus it is the southernmost latitude where the Sun can be seen directly overhead.

4. It reaches 90 degrees below the horizon at solar midnight on the June solstice.

5. The Tropic of Capricorn is one of the five major latitude lines of the Earth. The other four are latitude lines.

- Equator (0 degrees latitude)

- Tropic of Cancer (23.5 degrees north latitude)

- North Pole Circle (66.5 degrees north latitude)

- South Pole Circle (66.5 degrees south latitude)

The smallest continent is Australia. Therefore, the correct answer is (A) Australia. Australia is both a country and a continent, and it is often referred to as the "smallest continent" due to its relatively small landmass compared to other continents.