Correct Option
The Tropic of Capricorn is a significant line of latitude situated at approximately 23.5° South of the Equator. It represents the southernmost point on Earth where the Sun can be observed directly overhead at noon, an event that occurs during the December solstice.
The Tropic of Capricorn traverses the following ten countries:
- Namibia
- Botswana
- South Africa
- Mozambique
- Madagascar
- Australia
- Chile
- Argentina
- Paraguay
- Brazil
Based on this geographical fact, all four countries listed in the question - Australia (1), Namibia (2), Brazil (3), and Chile (4) - are intersected by the Tropic of Capricorn. Therefore, option (d) is the correct answer.
Incorrect Options
Options (a), (b), and (c) are incorrect because they do not include all the countries from the given list through which the Tropic of Capricorn passes. Since the Tropic of Capricorn passes through Australia, Namibia, Brazil, and Chile, any option that omits one or more of these countries is factually inaccurate.