The land of white elephants is (C) Thailand. This term is often used metaphorically to refer to Thailand, highlighting its cultural richness and uniqueness. In Thai culture, the white elephant is considered a symbol of good luck and prosperity.

(A) Species that are found only in some particular areas

Endemic species are those that are native and restricted to specific geographical areas and are not naturally found anywhere else in the world. They have evolved and adapted to particular local conditions, making them unique to those specific regions.

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)

South Atlantic Drift: Also known as the Westerlies Drift, it is the eastward continuation of the Brazil current.

The world's longest river, the Nile, flows through the continent of Africa. It is approximately 6,650 kilometers (4,130 miles) long and is a significant geographical feature in northeastern Africa. Therefore, the correct answer is (B) Africa.

Thimphu or Thimphu is the capital and largest city of the mountain nation of Bhutan.