ANSWER:
Arctic Circle (Red box at the top of the figure)
STEP-BY-STEP EXPLANATION:
A solstice occurs twice a year when the Sun reaches further south or north of the Earth.
In this case, there is a solstice because the sunlight reaches further north. In addition, this phenomenon occurs due to the tilt (tilt) of the Earth, and the number of hours of day / night light increases in different areas.
The zone 24 hours of daylight every day because almost all of this zone is directly exposed to sunlight, it would be the Arctic Circle zone since it will always be reached by the solar rays despite the rotation of the Earth.
