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What does the Southern Hemisphere refer to?

1. Time Zones

2. Prime Meridian

3. Rivers

4. Southern Hemisphere

The correct answer is: Southern Hemisphere

The Southern Hemisphere refers to the half of the Earth that lies south of the equator. This geographical division is significant for many reasons, including climate, biodiversity, and culture. In the Southern Hemisphere, you can find countries like Australia, Brazil, and parts of Africa. This area is also important for astronomical observations and understanding weather patterns that differ from those in the Northern Hemisphere. The other options do not accurately describe the Southern Hemisphere. Time zones are related to standardized regions of time and do not denote a specific geographical area. The Prime Meridian is a line of longitude that serves as a reference point for defining time zones and geographic coordinates, but it doesn't pertain to the Southern Hemisphere in any direct way. Rivers, while they may exist in the Southern Hemisphere, do not define it and are simply water bodies that can be found in various regions of the world.