What is meant by the term “Midnight Sun”?

Consecutive 24-hour periods of sunlight experienced in the north of the Arctic Circle and south of the Antarctic Circle.

The correct answer is Option (4) - Consecutive 24-hour periods of sunlight experienced in the north of the Arctic Circle and south of the Antarctic Circle.

The term "midnight sun" refers to the consecutive 24-hour periods of sunlight experienced in the north of the Arctic Circle and south of the Antarctic Circle. In other words, it means that the sun when seen in the middle of the night in summer in the arctic or antarctic (the parts of the world furthest to the north and the south)