"21 degrees south latitude" is the description of a parallel of latitude ... a circle
that goes all the way around the Earth.
That particular one crosses Namibia, Botswana, Zimbabwe, Mozambique, Madagascar,
Réunion, Australia, New Caledonia, Tonga, Cook Islands, Chile, Bolivia, Paraguay, and
Brazil.
The country located at 33 degrees South latitude and 55 degrees West longitude is Uruguay.
Since you did not specify the direction of longitude, the country located at 20 degrees south latitude and 140 degrees east longitude is Australia, while the country located at 20 degrees south latitude and 140 degrees west longitude is France. The location is French Polynesia, which is a French territory.
Paraguay is located at 23 degrees south latitude and 58 degrees west longitude.
Kenya.
Brazil.
Brazil.
Angola
Antarctica.
The latitude of the south pole is 90 degrees south latitude.The south pole is located at 90 degrees south latitude.The north pole is located at 90 degrees north latitude.
Kenya.
Australia is closest to there.
New Zealand is located at 40 degrees south latitude and 175 east longitude.