What is the Arctic Circle?

The Arctic Circle is an imaginary line located at 66.5° North latitude. It marks the southernmost point of the Arctic region, where, during the summer solstice, the sun does not set for 24 hours, known as the Midnight Sun. In winter, the sun does not rise for 24 hours, creating a period of complete darkness. The Arctic Circle divides the Earth into the Arctic region, which includes the North Pole, and the rest of the Northern Hemisphere. It plays a significant role in understanding the Earth’s climate and the extreme conditions found in polar areas.

This question related to Chapter 1 Social Science Class 6th NCERT.
From the Chapter 1. Locating Places on the Earth.
Give answer according to your understanding.