The aurora is regarded as one of the most beautiful wonders in nature. If we ride a spaceship over the north and south poles of the earth and look at the earth from distant space, we will see a glittering halo around the earth's magnetic poles, this The rings are called aurora eggs. Because the side facing the sun is a bit squashed, while the side facing the sun is slightly stretched, it assumes the shape of an egg. The aurora eggs are in continuous change, when tomorrow Dark, sometimes stretching toward the equator, and sometimes shrinking toward the poles. The halo at midnight appears the widest and brightest. Long-term observation statistics show that the most frequent places of the aurora are two near the north and south magnetic latitudes of 67 degrees The aurora zone is called the South Aurora area and the Northern Lights area. Aurora activity occurs almost every day in the aurora area. In the inner area surrounded by the aurora eggs, it is usually called the aurora cover area. Instead, there are fewer opportunities than lower-latitude aurora. In the middle and low latitudes, especially near the equator, aurora rarely occurs. What is the correct expression for the relationship between the "Aurora Egg", "Southern Aurora Area", "Northern Light Area", "Aurora Cover Area" and other concepts? ['The "Aurora cover area" is surrounded by "Aurora eggs", and the "Aurora borealis area" is distributed south of the northern "Aurora cover area".', 'The "Aurora region" is surrounded by "Aurora eggs", and the "Southern Aurora region" is distributed north of the "Aurora cap region" in the south.', '"Aurora area" surrounds "Aurora cover area", they are all surrounded by "Aurora eggs".', '"Aurora area" surrounds "Aurora eggs", "Aurora egg" surrounds "Aurora area".']