Here's why:
* Earth's Tilt: The Earth is tilted on its axis at approximately 23.5 degrees. This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year.
* December Solstice: During the December solstice, the Southern Hemisphere is tilted towards the sun, receiving the most direct sunlight. This results in longer days and warmer temperatures.
* Summer Solstice: For the Southern Hemisphere, the December solstice marks the summer solstice.
It's important to remember that while the Southern Hemisphere experiences its greatest exposure to the sun during the December solstice, the exact amount of sunlight varies depending on latitude. Areas closer to the South Pole receive more sunlight than those closer to the equator.