3. Which of the following only happens within the arctic or antarctic circle?

A. The Sun reaches the zenith

B. The Sun rises in the west and sets in the east

C. The Sun does not cross the meridian

D. The Sun is up for 24 hours at a time

C. The Sun does not cross the meridian, which is an imaginary line.

Explanation:

As all Meridien converges at the north and south poles, as there are no longitude or meridian lines running at this place so the sun continues to remain suspended at the same place throughout the day. As the solar noon is at other places on the earth and not at the poles of arctic and antarctic. Thus the sun does not go up or down this meridian. Rather its altitude in the sky constantly increases in winters, and sping and decreases in summers. All of this takes place due to the rotation of the planet on its axis. The tilt in motion creates an inclination for the sun rays falling on earth.